Finding the Fourth Proportional to 139,499.84, 192,412.32 and 91,737.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,499.84 : 192,412.32 = 91,737.92 : x
2. Step 2: Convert to fraction form
   139,499.84/192,412.32 = 91,737.92/x
3. Step 3: Cross multiply
   139,499.84x = 192,412.32 × 91,737.92
4. Step 4: Simplify right side
   139,499.84x = 17,651,506,019.17
5. Step 5: Solve for x
   x = 17,651,506,019.17/139,499.84
6. Step 6: Final answer
   x = 126,534.24