Finding the Fourth Proportional to 72,444.69, 99,973.61 and 40,613.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,444.69 : 99,973.61 = 40,613.60 : x
2. Step 2: Convert to fraction form
   72,444.69/99,973.61 = 40,613.60/x
3. Step 3: Cross multiply
   72,444.69x = 99,973.61 × 40,613.60
4. Step 4: Simplify right side
   72,444.69x = 4,060,287,504.16
5. Step 5: Solve for x
   x = 4,060,287,504.16/72,444.69
6. Step 6: Final answer
   x = 56,046.72