Finding the Fourth Proportional to 123,388.31, 185,156.19 and 113,349.98

Step by Step Solution

1. Step 1: Write the proportion equation
   123,388.31 : 185,156.19 = 113,349.98 : x
2. Step 2: Convert to fraction form
   123,388.31/185,156.19 = 113,349.98/x
3. Step 3: Cross multiply
   123,388.31x = 185,156.19 × 113,349.98
4. Step 4: Simplify right side
   123,388.31x = 20,987,449,507.60
5. Step 5: Solve for x
   x = 20,987,449,507.60/123,388.31
6. Step 6: Final answer
   x = 170,092.70