Finding the Fourth Proportional to 14,345.31, 21,513.12 and 5,458.53

Step by Step Solution

1. Step 1: Write the proportion equation
   14,345.31 : 21,513.12 = 5,458.53 : x
2. Step 2: Convert to fraction form
   14,345.31/21,513.12 = 5,458.53/x
3. Step 3: Cross multiply
   14,345.31x = 21,513.12 × 5,458.53
4. Step 4: Simplify right side
   14,345.31x = 117,429,903.35
5. Step 5: Solve for x
   x = 117,429,903.35/14,345.31
6. Step 6: Final answer
   x = 8,185.95