Finding the Fourth Proportional to 12,500.78, 18,756.21 and 4,711.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,500.78 : 18,756.21 = 4,711.82 : x
2. Step 2: Convert to fraction form
   12,500.78/18,756.21 = 4,711.82/x
3. Step 3: Cross multiply
   12,500.78x = 18,756.21 × 4,711.82
4. Step 4: Simplify right side
   12,500.78x = 88,375,885.40
5. Step 5: Solve for x
   x = 88,375,885.40/12,500.78
6. Step 6: Final answer
   x = 7,069.63