Finding the Fourth Proportional to 72,642.22, 100,258.70 and 42,431.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,642.22 : 100,258.70 = 42,431.04 : x
2. Step 2: Convert to fraction form
   72,642.22/100,258.70 = 42,431.04/x
3. Step 3: Cross multiply
   72,642.22x = 100,258.70 × 42,431.04
4. Step 4: Simplify right side
   72,642.22x = 4,254,080,697.89
5. Step 5: Solve for x
   x = 4,254,080,697.89/72,642.22
6. Step 6: Final answer
   x = 58,562.10