Finding the Fourth Proportional to 8,715.30, 13,058.55 and 7,419.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,715.30 : 13,058.55 = 7,419.30 : x
2. Step 2: Convert to fraction form
   8,715.30/13,058.55 = 7,419.30/x
3. Step 3: Cross multiply
   8,715.30x = 13,058.55 × 7,419.30
4. Step 4: Simplify right side
   8,715.30x = 96,885,300.02
5. Step 5: Solve for x
   x = 96,885,300.02/8,715.30
6. Step 6: Final answer
   x = 11,116.69