Finding the Fourth Proportional to 14,009.98, 21,014.16 and 5,131.30

Step by Step Solution

1. Step 1: Write the proportion equation
   14,009.98 : 21,014.16 = 5,131.30 : x
2. Step 2: Convert to fraction form
   14,009.98/21,014.16 = 5,131.30/x
3. Step 3: Cross multiply
   14,009.98x = 21,014.16 × 5,131.30
4. Step 4: Simplify right side
   14,009.98x = 107,829,959.21
5. Step 5: Solve for x
   x = 107,829,959.21/14,009.98
6. Step 6: Final answer
   x = 7,696.65