Finding the Fourth Proportional to 8,813.98, 12,159.10 and 5,276.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,813.98 : 12,159.10 = 5,276.50 : x
2. Step 2: Convert to fraction form
   8,813.98/12,159.10 = 5,276.50/x
3. Step 3: Cross multiply
   8,813.98x = 12,159.10 × 5,276.50
4. Step 4: Simplify right side
   8,813.98x = 64,157,491.15
5. Step 5: Solve for x
   x = 64,157,491.15/8,813.98
6. Step 6: Final answer
   x = 7,279.06