Finding the Fourth Proportional to 30,937.63, 42,693.72 and 16,790.17

Step by Step Solution

1. Step 1: Write the proportion equation
   30,937.63 : 42,693.72 = 16,790.17 : x
2. Step 2: Convert to fraction form
   30,937.63/42,693.72 = 16,790.17/x
3. Step 3: Cross multiply
   30,937.63x = 42,693.72 × 16,790.17
4. Step 4: Simplify right side
   30,937.63x = 716,834,816.73
5. Step 5: Solve for x
   x = 716,834,816.73/30,937.63
6. Step 6: Final answer
   x = 23,170.32