Finding the Fourth Proportional to 31,215.42, 43,077.34 and 17,068.30

Step by Step Solution

1. Step 1: Write the proportion equation
   31,215.42 : 43,077.34 = 17,068.30 : x
2. Step 2: Convert to fraction form
   31,215.42/43,077.34 = 17,068.30/x
3. Step 3: Cross multiply
   31,215.42x = 43,077.34 × 17,068.30
4. Step 4: Simplify right side
   31,215.42x = 735,256,962.32
5. Step 5: Solve for x
   x = 735,256,962.32/31,215.42
6. Step 6: Final answer
   x = 23,554.29