Finding the Fourth Proportional to 1,061.34, 1,464.36 and 641.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.34 : 1,464.36 = 641.93 : x
2. Step 2: Convert to fraction form
   1,061.34/1,464.36 = 641.93/x
3. Step 3: Cross multiply
   1,061.34x = 1,464.36 × 641.93
4. Step 4: Simplify right side
   1,061.34x = 940,006.89
5. Step 5: Solve for x
   x = 940,006.89/1,061.34
6. Step 6: Final answer
   x = 885.68