Finding the Fourth Proportional to 54,978.50, 75,870.35 and 31,104.66

Step by Step Solution

1. Step 1: Write the proportion equation
   54,978.50 : 75,870.35 = 31,104.66 : x
2. Step 2: Convert to fraction form
   54,978.50/75,870.35 = 31,104.66/x
3. Step 3: Cross multiply
   54,978.50x = 75,870.35 × 31,104.66
4. Step 4: Simplify right side
   54,978.50x = 2,359,921,440.83
5. Step 5: Solve for x
   x = 2,359,921,440.83/54,978.50
6. Step 6: Final answer
   x = 42,924.44