Finding the Fourth Proportional to 8,523.94, 12,788.98 and 2,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,523.94 : 12,788.98 = 2,978.10 : x
2. Step 2: Convert to fraction form
   8,523.94/12,788.98 = 2,978.10/x
3. Step 3: Cross multiply
   8,523.94x = 12,788.98 × 2,978.10
4. Step 4: Simplify right side
   8,523.94x = 38,086,861.34
5. Step 5: Solve for x
   x = 38,086,861.34/8,523.94
6. Step 6: Final answer
   x = 4,468.22