Finding the Fourth Proportional to 72,849.12, 99,875.84 and 71,520.48

Step by Step Solution

1. Step 1: Write the proportion equation
   72,849.12 : 99,875.84 = 71,520.48 : x
2. Step 2: Convert to fraction form
   72,849.12/99,875.84 = 71,520.48/x
3. Step 3: Cross multiply
   72,849.12x = 99,875.84 × 71,520.48
4. Step 4: Simplify right side
   72,849.12x = 7,143,168,017.20
5. Step 5: Solve for x
   x = 7,143,168,017.20/72,849.12
6. Step 6: Final answer
   x = 98,054.28