Finding the Fourth Proportional to 72,510.61, 108,761.52 and 43,115.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,510.61 : 108,761.52 = 43,115.50 : x
2. Step 2: Convert to fraction form
   72,510.61/108,761.52 = 43,115.50/x
3. Step 3: Cross multiply
   72,510.61x = 108,761.52 × 43,115.50
4. Step 4: Simplify right side
   72,510.61x = 4,689,307,315.56
5. Step 5: Solve for x
   x = 4,689,307,315.56/72,510.61
6. Step 6: Final answer
   x = 64,670.64