Finding the Fourth Proportional to 139,931,570.28, 193,081,651.38 and 81,180,767.73

Step by Step Solution

1. Step 1: Write the proportion equation
   139,931,570.28 : 193,081,651.38 = 81,180,767.73 : x
2. Step 2: Convert to fraction form
   139,931,570.28/193,081,651.38 = 81,180,767.73/x
3. Step 3: Cross multiply
   139,931,570.28x = 193,081,651.38 × 81,180,767.73
4. Step 4: Simplify right side
   139,931,570.28x = 15,674,516,693,604,614
5. Step 5: Solve for x
   x = 15,674,516,693,604,614/139,931,570.28
6. Step 6: Final answer
   x = 112,015,584.92