Finding the Fourth Proportional to 117,123,980.30, 161,536,847.81 and 102,964,892.55

Step by Step Solution

1. Step 1: Write the proportion equation
   117,123,980.30 : 161,536,847.81 = 102,964,892.55 : x
2. Step 2: Convert to fraction form
   117,123,980.30/161,536,847.81 = 102,964,892.55/x
3. Step 3: Cross multiply
   117,123,980.30x = 161,536,847.81 × 102,964,892.55
4. Step 4: Simplify right side
   117,123,980.30x = 16,632,624,176,501,766
5. Step 5: Solve for x
   x = 16,632,624,176,501,766/117,123,980.30
6. Step 6: Final answer
   x = 142,008,699.96