Finding the Fourth Proportional to 139,761.12, 192,871.20 and 76,098.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,761.12 : 192,871.20 = 76,098.72 : x
2. Step 2: Convert to fraction form
   139,761.12/192,871.20 = 76,098.72/x
3. Step 3: Cross multiply
   139,761.12x = 192,871.20 × 76,098.72
4. Step 4: Simplify right side
   139,761.12x = 14,677,251,444.86
5. Step 5: Solve for x
   x = 14,677,251,444.86/139,761.12
6. Step 6: Final answer
   x = 105,016.70