Finding the Fourth Proportional to 31,068.96, 42,875.10 and 16,921.77

Step by Step Solution

1. Step 1: Write the proportion equation
   31,068.96 : 42,875.10 = 16,921.77 : x
2. Step 2: Convert to fraction form
   31,068.96/42,875.10 = 16,921.77/x
3. Step 3: Cross multiply
   31,068.96x = 42,875.10 × 16,921.77
4. Step 4: Simplify right side
   31,068.96x = 725,522,580.93
5. Step 5: Solve for x
   x = 725,522,580.93/31,068.96
6. Step 6: Final answer
   x = 23,352.01