Finding the Fourth Proportional to 72,665.71, 108,804.45 and 42,655.06

Step by Step Solution

1. Step 1: Write the proportion equation
   72,665.71 : 108,804.45 = 42,655.06 : x
2. Step 2: Convert to fraction form
   72,665.71/108,804.45 = 42,655.06/x
3. Step 3: Cross multiply
   72,665.71x = 108,804.45 × 42,655.06
4. Step 4: Simplify right side
   72,665.71x = 4,641,060,343.02
5. Step 5: Solve for x
   x = 4,641,060,343.02/72,665.71
6. Step 6: Final answer
   x = 63,868.64