Finding the Fourth Proportional to 743,238,196.69, 1,025,417,663.79 and 421,331,629.34

Step by Step Solution

1. Step 1: Write the proportion equation
   743,238,196.69 : 1,025,417,663.79 = 421,331,629.34 : x
2. Step 2: Convert to fraction form
   743,238,196.69/1,025,417,663.79 = 421,331,629.34/x
3. Step 3: Cross multiply
   743,238,196.69x = 1,025,417,663.79 × 421,331,629.34
4. Step 4: Simplify right side
   743,238,196.69x = 432,040,895,038,656,960
5. Step 5: Solve for x
   x = 432,040,895,038,656,960/743,238,196.69
6. Step 6: Final answer
   x = 581,295,332.99