Finding the Fourth Proportional to 8,978.45, 13,465.94 and 5,276.35

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.45 : 13,465.94 = 5,276.35 : x
2. Step 2: Convert to fraction form
   8,978.45/13,465.94 = 5,276.35/x
3. Step 3: Cross multiply
   8,978.45x = 13,465.94 × 5,276.35
4. Step 4: Simplify right side
   8,978.45x = 71,051,026.57
5. Step 5: Solve for x
   x = 71,051,026.57/8,978.45
6. Step 6: Final answer
   x = 7,913.51