Finding the Fourth Proportional to 72,340.25, 99,820.55 and 40,504.01

Step by Step Solution

1. Step 1: Write the proportion equation
   72,340.25 : 99,820.55 = 40,504.01 : x
2. Step 2: Convert to fraction form
   72,340.25/99,820.55 = 40,504.01/x
3. Step 3: Cross multiply
   72,340.25x = 99,820.55 × 40,504.01
4. Step 4: Simplify right side
   72,340.25x = 4,043,132,157.56
5. Step 5: Solve for x
   x = 4,043,132,157.56/72,340.25
6. Step 6: Final answer
   x = 55,890.50