Finding the Fourth Proportional to 21,030.32, 31,543.04 and 5,446.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,030.32 : 31,543.04 = 5,446.72 : x
2. Step 2: Convert to fraction form
   21,030.32/31,543.04 = 5,446.72/x
3. Step 3: Cross multiply
   21,030.32x = 31,543.04 × 5,446.72
4. Step 4: Simplify right side
   21,030.32x = 171,806,106.83
5. Step 5: Solve for x
   x = 171,806,106.83/21,030.32
6. Step 6: Final answer
   x = 8,169.45