Finding the Fourth Proportional to 8,925.10, 12,315.78 and 5,147.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,925.10 : 12,315.78 = 5,147.50 : x
2. Step 2: Convert to fraction form
   8,925.10/12,315.78 = 5,147.50/x
3. Step 3: Cross multiply
   8,925.10x = 12,315.78 × 5,147.50
4. Step 4: Simplify right side
   8,925.10x = 63,395,477.55
5. Step 5: Solve for x
   x = 63,395,477.55/8,925.10
6. Step 6: Final answer
   x = 7,103.06