Finding the Fourth Proportional to 1,141.47, 1,575.06 and 637.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.47 : 1,575.06 = 637.32 : x
2. Step 2: Convert to fraction form
   1,141.47/1,575.06 = 637.32/x
3. Step 3: Cross multiply
   1,141.47x = 1,575.06 × 637.32
4. Step 4: Simplify right side
   1,141.47x = 1,003,817.24
5. Step 5: Solve for x
   x = 1,003,817.24/1,141.47
6. Step 6: Final answer
   x = 879.41