Finding the Fourth Proportional to 10,531.98, 15,784.30 and 4,284.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,531.98 : 15,784.30 = 4,284.72 : x
2. Step 2: Convert to fraction form
   10,531.98/15,784.30 = 4,284.72/x
3. Step 3: Cross multiply
   10,531.98x = 15,784.30 × 4,284.72
4. Step 4: Simplify right side
   10,531.98x = 67,631,305.90
5. Step 5: Solve for x
   x = 67,631,305.90/10,531.98
6. Step 6: Final answer
   x = 6,421.52