Finding the Fourth Proportional to 8,811.98, 12,156.33 and 5,274.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,811.98 : 12,156.33 = 5,274.50 : x
2. Step 2: Convert to fraction form
   8,811.98/12,156.33 = 5,274.50/x
3. Step 3: Cross multiply
   8,811.98x = 12,156.33 × 5,274.50
4. Step 4: Simplify right side
   8,811.98x = 64,118,612.76
5. Step 5: Solve for x
   x = 64,118,612.76/8,811.98
6. Step 6: Final answer
   x = 7,276.30