Finding the Fourth Proportional to 72,184.56, 99,616.88 and 40,354.80

Step by Step Solution

1. Step 1: Write the proportion equation
   72,184.56 : 99,616.88 = 40,354.80 : x
2. Step 2: Convert to fraction form
   72,184.56/99,616.88 = 40,354.80/x
3. Step 3: Cross multiply
   72,184.56x = 99,616.88 × 40,354.80
4. Step 4: Simplify right side
   72,184.56x = 4,020,019,269.02
5. Step 5: Solve for x
   x = 4,020,019,269.02/72,184.56
6. Step 6: Final answer
   x = 55,690.85