Finding the Fourth Proportional to 8,505.77, 12,762.90 and 5,549.99

Step by Step Solution

1. Step 1: Write the proportion equation
   8,505.77 : 12,762.90 = 5,549.99 : x
2. Step 2: Convert to fraction form
   8,505.77/12,762.90 = 5,549.99/x
3. Step 3: Cross multiply
   8,505.77x = 12,762.90 × 5,549.99
4. Step 4: Simplify right side
   8,505.77x = 70,833,903.56
5. Step 5: Solve for x
   x = 70,833,903.56/8,505.77
6. Step 6: Final answer
   x = 8,327.75