Finding the Fourth Proportional to 71,145.57, 98,186.72 and 39,315

Step by Step Solution

1. Step 1: Write the proportion equation
   71,145.57 : 98,186.72 = 39,315 : x
2. Step 2: Convert to fraction form
   71,145.57/98,186.72 = 39,315/x
3. Step 3: Cross multiply
   71,145.57x = 98,186.72 × 39,315
4. Step 4: Simplify right side
   71,145.57x = 3,860,210,700.23
5. Step 5: Solve for x
   x = 3,860,210,700.23/71,145.57
6. Step 6: Final answer
   x = 54,257.92