Finding the Fourth Proportional to 31,069.01, 42,875.71 and 16,921.85

Step by Step Solution

1. Step 1: Write the proportion equation
   31,069.01 : 42,875.71 = 16,921.85 : x
2. Step 2: Convert to fraction form
   31,069.01/42,875.71 = 16,921.85/x
3. Step 3: Cross multiply
   31,069.01x = 42,875.71 × 16,921.85
4. Step 4: Simplify right side
   31,069.01x = 725,536,076.58
5. Step 5: Solve for x
   x = 725,536,076.58/31,069.01
6. Step 6: Final answer
   x = 23,352.40