Finding the Fourth Proportional to 31,009.23, 42,792.30 and 16,861.77

Step by Step Solution

1. Step 1: Write the proportion equation
   31,009.23 : 42,792.30 = 16,861.77 : x
2. Step 2: Convert to fraction form
   31,009.23/42,792.30 = 16,861.77/x
3. Step 3: Cross multiply
   31,009.23x = 42,792.30 × 16,861.77
4. Step 4: Simplify right side
   31,009.23x = 721,553,920.37
5. Step 5: Solve for x
   x = 721,553,920.37/31,009.23
6. Step 6: Final answer
   x = 23,269.00