Finding the Fourth Proportional to 31,063.79, 42,868.52 and 16,916.62

Step by Step Solution

1. Step 1: Write the proportion equation
   31,063.79 : 42,868.52 = 16,916.62 : x
2. Step 2: Convert to fraction form
   31,063.79/42,868.52 = 16,916.62/x
3. Step 3: Cross multiply
   31,063.79x = 42,868.52 × 16,916.62
4. Step 4: Simplify right side
   31,063.79x = 725,190,462.80
5. Step 5: Solve for x
   x = 725,190,462.80/31,063.79
6. Step 6: Final answer
   x = 23,345.20