Finding the Fourth Proportional to 139,178,426.54, 208,764,909.83 and 56,177,971.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,178,426.54 : 208,764,909.83 = 56,177,971.16 : x
2. Step 2: Convert to fraction form
   139,178,426.54/208,764,909.83 = 56,177,971.16/x
3. Step 3: Cross multiply
   139,178,426.54x = 208,764,909.83 × 56,177,971.16
4. Step 4: Simplify right side
   139,178,426.54x = 11,727,989,082,746,362
5. Step 5: Solve for x
   x = 11,727,989,082,746,362/139,178,426.54
6. Step 6: Final answer
   x = 84,265,854.81