Finding the Fourth Proportional to 12,865.89, 19,298.85 and 5,074.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,865.89 : 19,298.85 = 5,074.50 : x
2. Step 2: Convert to fraction form
   12,865.89/19,298.85 = 5,074.50/x
3. Step 3: Cross multiply
   12,865.89x = 19,298.85 × 5,074.50
4. Step 4: Simplify right side
   12,865.89x = 97,932,014.33
5. Step 5: Solve for x
   x = 97,932,014.33/12,865.89
6. Step 6: Final answer
   x = 7,611.76