Finding the Fourth Proportional to 14,191.30, 21,279.55 and 5,299.31

Step by Step Solution

1. Step 1: Write the proportion equation
   14,191.30 : 21,279.55 = 5,299.31 : x
2. Step 2: Convert to fraction form
   14,191.30/21,279.55 = 5,299.31/x
3. Step 3: Cross multiply
   14,191.30x = 21,279.55 × 5,299.31
4. Step 4: Simplify right side
   14,191.30x = 112,766,985.31
5. Step 5: Solve for x
   x = 112,766,985.31/14,191.30
6. Step 6: Final answer
   x = 7,946.21