Finding the Fourth Proportional to 71,607.32, 98,819.46 and 39,779.18

Step by Step Solution

1. Step 1: Write the proportion equation
   71,607.32 : 98,819.46 = 39,779.18 : x
2. Step 2: Convert to fraction form
   71,607.32/98,819.46 = 39,779.18/x
3. Step 3: Cross multiply
   71,607.32x = 98,819.46 × 39,779.18
4. Step 4: Simplify right side
   71,607.32x = 3,930,957,086.84
5. Step 5: Solve for x
   x = 3,930,957,086.84/71,607.32
6. Step 6: Final answer
   x = 54,896.02