Finding the Fourth Proportional to 72,379.02, 99,887.16 and 40,558.17

Step by Step Solution

1. Step 1: Write the proportion equation
   72,379.02 : 99,887.16 = 40,558.17 : x
2. Step 2: Convert to fraction form
   72,379.02/99,887.16 = 40,558.17/x
3. Step 3: Cross multiply
   72,379.02x = 99,887.16 × 40,558.17
4. Step 4: Simplify right side
   72,379.02x = 4,051,240,416.10
5. Step 5: Solve for x
   x = 4,051,240,416.10/72,379.02
6. Step 6: Final answer
   x = 55,972.58