Finding the Fourth Proportional to 55,128.76, 76,068.30 and 31,250.56

Step by Step Solution

1. Step 1: Write the proportion equation
   55,128.76 : 76,068.30 = 31,250.56 : x
2. Step 2: Convert to fraction form
   55,128.76/76,068.30 = 31,250.56/x
3. Step 3: Cross multiply
   55,128.76x = 76,068.30 × 31,250.56
4. Step 4: Simplify right side
   55,128.76x = 2,377,176,973.25
5. Step 5: Solve for x
   x = 2,377,176,973.25/55,128.76
6. Step 6: Final answer
   x = 43,120.45