Finding the Fourth Proportional to 72,401.61, 99,918.18 and 40,580.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,401.61 : 99,918.18 = 40,580.76 : x
2. Step 2: Convert to fraction form
   72,401.61/99,918.18 = 40,580.76/x
3. Step 3: Cross multiply
   72,401.61x = 99,918.18 × 40,580.76
4. Step 4: Simplify right side
   72,401.61x = 4,054,755,682.22
5. Step 5: Solve for x
   x = 4,054,755,682.22/72,401.61
6. Step 6: Final answer
   x = 56,003.67