Finding the Fourth Proportional to 139,314.90, 192,285.18 and 91,572.69

Step by Step Solution

1. Step 1: Write the proportion equation
   139,314.90 : 192,285.18 = 91,572.69 : x
2. Step 2: Convert to fraction form
   139,314.90/192,285.18 = 91,572.69/x
3. Step 3: Cross multiply
   139,314.90x = 192,285.18 × 91,572.69
4. Step 4: Simplify right side
   139,314.90x = 17,608,071,179.73
5. Step 5: Solve for x
   x = 17,608,071,179.73/139,314.90
6. Step 6: Final answer
   x = 126,390.44