Finding the Fourth Proportional to 72,434.64, 108,642.72 and 28,031.01

Step by Step Solution

1. Step 1: Write the proportion equation
   72,434.64 : 108,642.72 = 28,031.01 : x
2. Step 2: Convert to fraction form
   72,434.64/108,642.72 = 28,031.01/x
3. Step 3: Cross multiply
   72,434.64x = 108,642.72 × 28,031.01
4. Step 4: Simplify right side
   72,434.64x = 3,045,365,170.75
5. Step 5: Solve for x
   x = 3,045,365,170.75/72,434.64
6. Step 6: Final answer
   x = 42,042.94