Finding the Fourth Proportional to 1,034.51, 1,427.67 and 641.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.51 : 1,427.67 = 641.52 : x
2. Step 2: Convert to fraction form
   1,034.51/1,427.67 = 641.52/x
3. Step 3: Cross multiply
   1,034.51x = 1,427.67 × 641.52
4. Step 4: Simplify right side
   1,034.51x = 915,878.86
5. Step 5: Solve for x
   x = 915,878.86/1,034.51
6. Step 6: Final answer
   x = 885.33