Finding the Fourth Proportional to 53,978.48, 74,495.92 and 31,310.72

Step by Step Solution

1. Step 1: Write the proportion equation
   53,978.48 : 74,495.92 = 31,310.72 : x
2. Step 2: Convert to fraction form
   53,978.48/74,495.92 = 31,310.72/x
3. Step 3: Cross multiply
   53,978.48x = 74,495.92 × 31,310.72
4. Step 4: Simplify right side
   53,978.48x = 2,332,520,892.26
5. Step 5: Solve for x
   x = 2,332,520,892.26/53,978.48
6. Step 6: Final answer
   x = 43,212.05