Finding the Fourth Proportional to 31,068.50, 42,875.02 and 16,921.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,068.50 : 42,875.02 = 16,921.34 : x
2. Step 2: Convert to fraction form
   31,068.50/42,875.02 = 16,921.34/x
3. Step 3: Cross multiply
   31,068.50x = 42,875.02 × 16,921.34
4. Step 4: Simplify right side
   31,068.50x = 725,502,758.48
5. Step 5: Solve for x
   x = 725,502,758.48/31,068.50
6. Step 6: Final answer
   x = 23,351.72