Finding the Fourth Proportional to 189,380.47, 261,251.42 and 123,930.55

Step by Step Solution

1. Step 1: Write the proportion equation
   189,380.47 : 261,251.42 = 123,930.55 : x
2. Step 2: Convert to fraction form
   189,380.47/261,251.42 = 123,930.55/x
3. Step 3: Cross multiply
   189,380.47x = 261,251.42 × 123,930.55
4. Step 4: Simplify right side
   189,380.47x = 32,377,030,862.62
5. Step 5: Solve for x
   x = 32,377,030,862.62/189,380.47
6. Step 6: Final answer
   x = 170,962.89