Finding the Fourth Proportional to 137,894.39, 190,128.69 and 99,592.73

Step by Step Solution

1. Step 1: Write the proportion equation
   137,894.39 : 190,128.69 = 99,592.73 : x
2. Step 2: Convert to fraction form
   137,894.39/190,128.69 = 99,592.73/x
3. Step 3: Cross multiply
   137,894.39x = 190,128.69 × 99,592.73
4. Step 4: Simplify right side
   137,894.39x = 18,935,434,337.78
5. Step 5: Solve for x
   x = 18,935,434,337.78/137,894.39
6. Step 6: Final answer
   x = 137,318.39