Finding the Fourth Proportional to 15,314.63, 21,068.57 and 14,658.53

Step by Step Solution

1. Step 1: Write the proportion equation
   15,314.63 : 21,068.57 = 14,658.53 : x
2. Step 2: Convert to fraction form
   15,314.63/21,068.57 = 14,658.53/x
3. Step 3: Cross multiply
   15,314.63x = 21,068.57 × 14,658.53
4. Step 4: Simplify right side
   15,314.63x = 308,834,196.71
5. Step 5: Solve for x
   x = 308,834,196.71/15,314.63
6. Step 6: Final answer
   x = 20,165.97