Finding the Fourth Proportional to 1,142.16, 1,575.81 and 637.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.16 : 1,575.81 = 637.93 : x
2. Step 2: Convert to fraction form
   1,142.16/1,575.81 = 637.93/x
3. Step 3: Cross multiply
   1,142.16x = 1,575.81 × 637.93
4. Step 4: Simplify right side
   1,142.16x = 1,005,256.47
5. Step 5: Solve for x
   x = 1,005,256.47/1,142.16
6. Step 6: Final answer
   x = 880.14