Finding the Fourth Proportional to 72,251.02, 99,704.90 and 40,420.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,251.02 : 99,704.90 = 40,420.18 : x
2. Step 2: Convert to fraction form
   72,251.02/99,704.90 = 40,420.18/x
3. Step 3: Cross multiply
   72,251.02x = 99,704.90 × 40,420.18
4. Step 4: Simplify right side
   72,251.02x = 4,030,090,004.88
5. Step 5: Solve for x
   x = 4,030,090,004.88/72,251.02
6. Step 6: Final answer
   x = 55,779.00