Finding the Fourth Proportional to 9,813.63, 14,710.38 and 5,131.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,813.63 : 14,710.38 = 5,131.15 : x
2. Step 2: Convert to fraction form
   9,813.63/14,710.38 = 5,131.15/x
3. Step 3: Cross multiply
   9,813.63x = 14,710.38 × 5,131.15
4. Step 4: Simplify right side
   9,813.63x = 75,481,166.34
5. Step 5: Solve for x
   x = 75,481,166.34/9,813.63
6. Step 6: Final answer
   x = 7,691.46