Finding the Fourth Proportional to 14,309.69, 21,457.71 and 5,300.87

Step by Step Solution

1. Step 1: Write the proportion equation
   14,309.69 : 21,457.71 = 5,300.87 : x
2. Step 2: Convert to fraction form
   14,309.69/21,457.71 = 5,300.87/x
3. Step 3: Cross multiply
   14,309.69x = 21,457.71 × 5,300.87
4. Step 4: Simplify right side
   14,309.69x = 113,744,423.92
5. Step 5: Solve for x
   x = 113,744,423.92/14,309.69
6. Step 6: Final answer
   x = 7,948.77