Finding the Fourth Proportional to 72,417.31, 108,634.16 and 64,976.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,417.31 : 108,634.16 = 64,976.04 : x
2. Step 2: Convert to fraction form
   72,417.31/108,634.16 = 64,976.04/x
3. Step 3: Cross multiply
   72,417.31x = 108,634.16 × 64,976.04
4. Step 4: Simplify right side
   72,417.31x = 7,058,617,687.97
5. Step 5: Solve for x
   x = 7,058,617,687.97/72,417.31
6. Step 6: Final answer
   x = 97,471.42