Finding the Fourth Proportional to 55,499.70, 76,585.21 and 31,621.71

Step by Step Solution

1. Step 1: Write the proportion equation
   55,499.70 : 76,585.21 = 31,621.71 : x
2. Step 2: Convert to fraction form
   55,499.70/76,585.21 = 31,621.71/x
3. Step 3: Cross multiply
   55,499.70x = 76,585.21 × 31,621.71
4. Step 4: Simplify right side
   55,499.70x = 2,421,755,300.91
5. Step 5: Solve for x
   x = 2,421,755,300.91/55,499.70
6. Step 6: Final answer
   x = 43,635.47