Finding the Fourth Proportional to 53,434.72, 73,740.24 and 31,078.72

Step by Step Solution

1. Step 1: Write the proportion equation
   53,434.72 : 73,740.24 = 31,078.72 : x
2. Step 2: Convert to fraction form
   53,434.72/73,740.24 = 31,078.72/x
3. Step 3: Cross multiply
   53,434.72x = 73,740.24 × 31,078.72
4. Step 4: Simplify right side
   53,434.72x = 2,291,752,271.69
5. Step 5: Solve for x
   x = 2,291,752,271.69/53,434.72
6. Step 6: Final answer
   x = 42,888.82