Finding the Fourth Proportional to 31,215.76, 43,077.76 and 17,068.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,215.76 : 43,077.76 = 17,068.72 : x
2. Step 2: Convert to fraction form
   31,215.76/43,077.76 = 17,068.72/x
3. Step 3: Cross multiply
   31,215.76x = 43,077.76 × 17,068.72
4. Step 4: Simplify right side
   31,215.76x = 735,282,223.67
5. Step 5: Solve for x
   x = 735,282,223.67/31,215.76
6. Step 6: Final answer
   x = 23,554.84