Finding the Fourth Proportional to 8,748.76, 13,118.32 and 5,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,748.76 : 13,118.32 = 5,978.56 : x
2. Step 2: Convert to fraction form
   8,748.76/13,118.32 = 5,978.56/x
3. Step 3: Cross multiply
   8,748.76x = 13,118.32 × 5,978.56
4. Step 4: Simplify right side
   8,748.76x = 78,428,663.22
5. Step 5: Solve for x
   x = 78,428,663.22/8,748.76
6. Step 6: Final answer
   x = 8,964.55