Finding the Fourth Proportional to 8,758.49, 13,130.64 and 5,978.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,758.49 : 13,130.64 = 5,978.16 : x
2. Step 2: Convert to fraction form
   8,758.49/13,130.64 = 5,978.16/x
3. Step 3: Cross multiply
   8,758.49x = 13,130.64 × 5,978.16
4. Step 4: Simplify right side
   8,758.49x = 78,497,066.82
5. Step 5: Solve for x
   x = 78,497,066.82/8,758.49
6. Step 6: Final answer
   x = 8,962.40