Finding the Fourth Proportional to 55,128.08, 76,074.46 and 31,256.37

Step by Step Solution

1. Step 1: Write the proportion equation
   55,128.08 : 76,074.46 = 31,256.37 : x
2. Step 2: Convert to fraction form
   55,128.08/76,074.46 = 31,256.37/x
3. Step 3: Cross multiply
   55,128.08x = 76,074.46 × 31,256.37
4. Step 4: Simplify right side
   55,128.08x = 2,377,811,391.17
5. Step 5: Solve for x
   x = 2,377,811,391.17/55,128.08
6. Step 6: Final answer
   x = 43,132.49