Finding the Fourth Proportional to 14,343.47, 21,500.72 and 4,978.86

Step by Step Solution

1. Step 1: Write the proportion equation
   14,343.47 : 21,500.72 = 4,978.86 : x
2. Step 2: Convert to fraction form
   14,343.47/21,500.72 = 4,978.86/x
3. Step 3: Cross multiply
   14,343.47x = 21,500.72 × 4,978.86
4. Step 4: Simplify right side
   14,343.47x = 107,049,074.78
5. Step 5: Solve for x
   x = 107,049,074.78/14,343.47
6. Step 6: Final answer
   x = 7,463.26