Finding the Fourth Proportional to 31,005.24, 42,787.68 and 16,858.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,005.24 : 42,787.68 = 16,858.32 : x
2. Step 2: Convert to fraction form
   31,005.24/42,787.68 = 16,858.32/x
3. Step 3: Cross multiply
   31,005.24x = 42,787.68 × 16,858.32
4. Step 4: Simplify right side
   31,005.24x = 721,328,401.50
5. Step 5: Solve for x
   x = 721,328,401.50/31,005.24
6. Step 6: Final answer
   x = 23,264.73