Finding the Fourth Proportional to 72,041.16, 99,404.91 and 40,210.05

Step by Step Solution

1. Step 1: Write the proportion equation
   72,041.16 : 99,404.91 = 40,210.05 : x
2. Step 2: Convert to fraction form
   72,041.16/99,404.91 = 40,210.05/x
3. Step 3: Cross multiply
   72,041.16x = 99,404.91 × 40,210.05
4. Step 4: Simplify right side
   72,041.16x = 3,997,076,401.35
5. Step 5: Solve for x
   x = 3,997,076,401.35/72,041.16
6. Step 6: Final answer
   x = 55,483.23