Finding the Fourth Proportional to 478,517,796.64, 717,904,289.94 and 171,812,566.72

Step by Step Solution

1. Step 1: Write the proportion equation
   478,517,796.64 : 717,904,289.94 = 171,812,566.72 : x
2. Step 2: Convert to fraction form
   478,517,796.64/717,904,289.94 = 171,812,566.72/x
3. Step 3: Cross multiply
   478,517,796.64x = 717,904,289.94 × 171,812,566.72
4. Step 4: Simplify right side
   478,517,796.64x = 123,344,978,713,890,480
5. Step 5: Solve for x
   x = 123,344,978,713,890,480/478,517,796.64
6. Step 6: Final answer
   x = 257,764,663.26