Finding the Fourth Proportional to 619,139,061.12, 854,386,287.68 and 336,882,663.68

Step by Step Solution

1. Step 1: Write the proportion equation
   619,139,061.12 : 854,386,287.68 = 336,882,663.68 : x
2. Step 2: Convert to fraction form
   619,139,061.12/854,386,287.68 = 336,882,663.68/x
3. Step 3: Cross multiply
   619,139,061.12x = 854,386,287.68 × 336,882,663.68
4. Step 4: Simplify right side
   619,139,061.12x = 287,827,928,405,305,152
5. Step 5: Solve for x
   x = 287,827,928,405,305,152/619,139,061.12
6. Step 6: Final answer
   x = 464,884,137.47