Finding the Fourth Proportional to 40,134.15, 55,379.88 and 23,139.03

Step by Step Solution

1. Step 1: Write the proportion equation
   40,134.15 : 55,379.88 = 23,139.03 : x
2. Step 2: Convert to fraction form
   40,134.15/55,379.88 = 23,139.03/x
3. Step 3: Cross multiply
   40,134.15x = 55,379.88 × 23,139.03
4. Step 4: Simplify right side
   40,134.15x = 1,281,436,704.72
5. Step 5: Solve for x
   x = 1,281,436,704.72/40,134.15
6. Step 6: Final answer
   x = 31,928.84