Finding the Fourth Proportional to 31,215.91, 43,078.10 and 17,068.74

Step by Step Solution

1. Step 1: Write the proportion equation
   31,215.91 : 43,078.10 = 17,068.74 : x
2. Step 2: Convert to fraction form
   31,215.91/43,078.10 = 17,068.74/x
3. Step 3: Cross multiply
   31,215.91x = 43,078.10 × 17,068.74
4. Step 4: Simplify right side
   31,215.91x = 735,288,803.25
5. Step 5: Solve for x
   x = 735,288,803.25/31,215.91
6. Step 6: Final answer
   x = 23,554.94