Finding the Fourth Proportional to 7,431.51, 10,256.79 and 5,644.91

Step by Step Solution

1. Step 1: Write the proportion equation
   7,431.51 : 10,256.79 = 5,644.91 : x
2. Step 2: Convert to fraction form
   7,431.51/10,256.79 = 5,644.91/x
3. Step 3: Cross multiply
   7,431.51x = 10,256.79 × 5,644.91
4. Step 4: Simplify right side
   7,431.51x = 57,898,605.15
5. Step 5: Solve for x
   x = 57,898,605.15/7,431.51
6. Step 6: Final answer
   x = 7,790.96