Finding the Fourth Proportional to 8,784.56, 13,168.20 and 4,880.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,784.56 : 13,168.20 = 4,880.90 : x
2. Step 2: Convert to fraction form
   8,784.56/13,168.20 = 4,880.90/x
3. Step 3: Cross multiply
   8,784.56x = 13,168.20 × 4,880.90
4. Step 4: Simplify right side
   8,784.56x = 64,272,667.38
5. Step 5: Solve for x
   x = 64,272,667.38/8,784.56
6. Step 6: Final answer
   x = 7,316.55