Finding the Fourth Proportional to 139,022.46, 191,859.28 and 78,598.74

Step by Step Solution

1. Step 1: Write the proportion equation
   139,022.46 : 191,859.28 = 78,598.74 : x
2. Step 2: Convert to fraction form
   139,022.46/191,859.28 = 78,598.74/x
3. Step 3: Cross multiply
   139,022.46x = 191,859.28 × 78,598.74
4. Step 4: Simplify right side
   139,022.46x = 15,079,897,665.31
5. Step 5: Solve for x
   x = 15,079,897,665.31/139,022.46
6. Step 6: Final answer
   x = 108,470.95