Finding the Fourth Proportional to 185,922.48, 256,500.59 and 137,639.99

Step by Step Solution

1. Step 1: Write the proportion equation
   185,922.48 : 256,500.59 = 137,639.99 : x
2. Step 2: Convert to fraction form
   185,922.48/256,500.59 = 137,639.99/x
3. Step 3: Cross multiply
   185,922.48x = 256,500.59 × 137,639.99
4. Step 4: Simplify right side
   185,922.48x = 35,304,736,671.89
5. Step 5: Solve for x
   x = 35,304,736,671.89/185,922.48
6. Step 6: Final answer
   x = 189,889.55