Finding the Fourth Proportional to 54,092.03, 74,651.04 and 31,128.89

Step by Step Solution

1. Step 1: Write the proportion equation
   54,092.03 : 74,651.04 = 31,128.89 : x
2. Step 2: Convert to fraction form
   54,092.03/74,651.04 = 31,128.89/x
3. Step 3: Cross multiply
   54,092.03x = 74,651.04 × 31,128.89
4. Step 4: Simplify right side
   54,092.03x = 2,323,804,012.55
5. Step 5: Solve for x
   x = 2,323,804,012.55/54,092.03
6. Step 6: Final answer
   x = 42,960.19