Finding the Fourth Proportional to 8,721.12, 12,034.80 and 4,742.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,721.12 : 12,034.80 = 4,742.16 : x
2. Step 2: Convert to fraction form
   8,721.12/12,034.80 = 4,742.16/x
3. Step 3: Cross multiply
   8,721.12x = 12,034.80 × 4,742.16
4. Step 4: Simplify right side
   8,721.12x = 57,070,947.17
5. Step 5: Solve for x
   x = 57,070,947.17/8,721.12
6. Step 6: Final answer
   x = 6,543.99