Finding the Fourth Proportional to 72,405.17, 99,915.01 and 42,195.41

Step by Step Solution

1. Step 1: Write the proportion equation
   72,405.17 : 99,915.01 = 42,195.41 : x
2. Step 2: Convert to fraction form
   72,405.17/99,915.01 = 42,195.41/x
3. Step 3: Cross multiply
   72,405.17x = 99,915.01 × 42,195.41
4. Step 4: Simplify right side
   72,405.17x = 4,215,954,207.04
5. Step 5: Solve for x
   x = 4,215,954,207.04/72,405.17
6. Step 6: Final answer
   x = 58,227.26