Finding the Fourth Proportional to 8,748.80, 12,077.43 and 5,606.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,748.80 : 12,077.43 = 5,606.78 : x
2. Step 2: Convert to fraction form
   8,748.80/12,077.43 = 5,606.78/x
3. Step 3: Cross multiply
   8,748.80x = 12,077.43 × 5,606.78
4. Step 4: Simplify right side
   8,748.80x = 67,715,492.98
5. Step 5: Solve for x
   x = 67,715,492.98/8,748.80
6. Step 6: Final answer
   x = 7,739.97