Finding the Fourth Proportional to 642,234,870.66, 963,270,129.42 and 205,499,018.82

Step by Step Solution

1. Step 1: Write the proportion equation
   642,234,870.66 : 963,270,129.42 = 205,499,018.82 : x
2. Step 2: Convert to fraction form
   642,234,870.66/963,270,129.42 = 205,499,018.82/x
3. Step 3: Cross multiply
   642,234,870.66x = 963,270,129.42 × 205,499,018.82
4. Step 4: Simplify right side
   642,234,870.66x = 197,951,066,454,424,384
5. Step 5: Solve for x
   x = 197,951,066,454,424,384/642,234,870.66
6. Step 6: Final answer
   x = 308,222,233.79