Finding the Fourth Proportional to 8,790.72, 12,130.86 and 5,251.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,790.72 : 12,130.86 = 5,251.82 : x
2. Step 2: Convert to fraction form
   8,790.72/12,130.86 = 5,251.82/x
3. Step 3: Cross multiply
   8,790.72x = 12,130.86 × 5,251.82
4. Step 4: Simplify right side
   8,790.72x = 63,709,093.17
5. Step 5: Solve for x
   x = 63,709,093.17/8,790.72
6. Step 6: Final answer
   x = 7,247.31