Finding the Fourth Proportional to 55,300.60, 76,311.54 and 31,423.96

Step by Step Solution

1. Step 1: Write the proportion equation
   55,300.60 : 76,311.54 = 31,423.96 : x
2. Step 2: Convert to fraction form
   55,300.60/76,311.54 = 31,423.96/x
3. Step 3: Cross multiply
   55,300.60x = 76,311.54 × 31,423.96
4. Step 4: Simplify right side
   55,300.60x = 2,398,010,780.50
5. Step 5: Solve for x
   x = 2,398,010,780.50/55,300.60
6. Step 6: Final answer
   x = 43,363.20