Finding the Fourth Proportional to 55,081.60, 76,010.16 and 31,210.72

Step by Step Solution

1. Step 1: Write the proportion equation
   55,081.60 : 76,010.16 = 31,210.72 : x
2. Step 2: Convert to fraction form
   55,081.60/76,010.16 = 31,210.72/x
3. Step 3: Cross multiply
   55,081.60x = 76,010.16 × 31,210.72
4. Step 4: Simplify right side
   55,081.60x = 2,372,331,820.92
5. Step 5: Solve for x
   x = 2,372,331,820.92/55,081.60
6. Step 6: Final answer
   x = 43,069.41