Finding the Fourth Proportional to 72,417.06, 108,633.78 and 64,975.80

Step by Step Solution

1. Step 1: Write the proportion equation
   72,417.06 : 108,633.78 = 64,975.80 : x
2. Step 2: Convert to fraction form
   72,417.06/108,633.78 = 64,975.80/x
3. Step 3: Cross multiply
   72,417.06x = 108,633.78 × 64,975.80
4. Step 4: Simplify right side
   72,417.06x = 7,058,566,762.52
5. Step 5: Solve for x
   x = 7,058,566,762.52/72,417.06
6. Step 6: Final answer
   x = 97,471.05