Finding the Fourth Proportional to 12,726,356.31, 17,559,309.33 and 7,499,578.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,726,356.31 : 17,559,309.33 = 7,499,578.05 : x
2. Step 2: Convert to fraction form
   12,726,356.31/17,559,309.33 = 7,499,578.05/x
3. Step 3: Cross multiply
   12,726,356.31x = 17,559,309.33 × 7,499,578.05
4. Step 4: Simplify right side
   12,726,356.31x = 131,687,410,824,428.19
5. Step 5: Solve for x
   x = 131,687,410,824,428.19/12,726,356.31
6. Step 6: Final answer
   x = 10,347,613.07