Finding the Fourth Proportional to 139,817.31, 192,947.90 and 76,155.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,817.31 : 192,947.90 = 76,155.15 : x
2. Step 2: Convert to fraction form
   139,817.31/192,947.90 = 76,155.15/x
3. Step 3: Cross multiply
   139,817.31x = 192,947.90 × 76,155.15
4. Step 4: Simplify right side
   139,817.31x = 14,693,975,885.91
5. Step 5: Solve for x
   x = 14,693,975,885.91/139,817.31
6. Step 6: Final answer
   x = 105,094.11