Finding the Fourth Proportional to 72,512.61, 108,764.52 and 43,117.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,512.61 : 108,764.52 = 43,117.50 : x
2. Step 2: Convert to fraction form
   72,512.61/108,764.52 = 43,117.50/x
3. Step 3: Cross multiply
   72,512.61x = 108,764.52 × 43,117.50
4. Step 4: Simplify right side
   72,512.61x = 4,689,654,191.10
5. Step 5: Solve for x
   x = 4,689,654,191.10/72,512.61
6. Step 6: Final answer
   x = 64,673.64