Finding the Fourth Proportional to 31,821.08, 47,751.72 and 17,790.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,821.08 : 47,751.72 = 17,790.31 : x
2. Step 2: Convert to fraction form
   31,821.08/47,751.72 = 17,790.31/x
3. Step 3: Cross multiply
   31,821.08x = 47,751.72 × 17,790.31
4. Step 4: Simplify right side
   31,821.08x = 849,517,901.83
5. Step 5: Solve for x
   x = 849,517,901.83/31,821.08
6. Step 6: Final answer
   x = 26,696.70