Finding the Fourth Proportional to 139,449.31, 192,441.53 and 75,787.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,449.31 : 192,441.53 = 75,787.10 : x
2. Step 2: Convert to fraction form
   139,449.31/192,441.53 = 75,787.10/x
3. Step 3: Cross multiply
   139,449.31x = 192,441.53 × 75,787.10
4. Step 4: Simplify right side
   139,449.31x = 14,584,585,478.26
5. Step 5: Solve for x
   x = 14,584,585,478.26/139,449.31
6. Step 6: Final answer
   x = 104,587.00