Finding the Fourth Proportional to 7,159.86, 9,881.46 and 4,644.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,159.86 : 9,881.46 = 4,644.72 : x
2. Step 2: Convert to fraction form
   7,159.86/9,881.46 = 4,644.72/x
3. Step 3: Cross multiply
   7,159.86x = 9,881.46 × 4,644.72
4. Step 4: Simplify right side
   7,159.86x = 45,896,614.89
5. Step 5: Solve for x
   x = 45,896,614.89/7,159.86
6. Step 6: Final answer
   x = 6,410.27