Finding the Fourth Proportional to 72,023.04, 99,435.60 and 49,399.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,023.04 : 99,435.60 = 49,399.20 : x
2. Step 2: Convert to fraction form
   72,023.04/99,435.60 = 49,399.20/x
3. Step 3: Cross multiply
   72,023.04x = 99,435.60 × 49,399.20
4. Step 4: Simplify right side
   72,023.04x = 4,912,039,091.52
5. Step 5: Solve for x
   x = 4,912,039,091.52/72,023.04
6. Step 6: Final answer
   x = 68,200.94