Finding the Fourth Proportional to 8,978.94, 12,397.02 and 5,623.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.94 : 12,397.02 = 5,623.10 : x
2. Step 2: Convert to fraction form
   8,978.94/12,397.02 = 5,623.10/x
3. Step 3: Cross multiply
   8,978.94x = 12,397.02 × 5,623.10
4. Step 4: Simplify right side
   8,978.94x = 69,709,683.16
5. Step 5: Solve for x
   x = 69,709,683.16/8,978.94
6. Step 6: Final answer
   x = 7,763.69