Finding the Fourth Proportional to 55,354.72, 76,387.20 and 31,478.08

Step by Step Solution

1. Step 1: Write the proportion equation
   55,354.72 : 76,387.20 = 31,478.08 : x
2. Step 2: Convert to fraction form
   55,354.72/76,387.20 = 31,478.08/x
3. Step 3: Cross multiply
   55,354.72x = 76,387.20 × 31,478.08
4. Step 4: Simplify right side
   55,354.72x = 2,404,522,392.58
5. Step 5: Solve for x
   x = 2,404,522,392.58/55,354.72
6. Step 6: Final answer
   x = 43,438.43