Finding the Fourth Proportional to 1,667.26, 2,502.33 and 641.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.26 : 2,502.33 = 641.98 : x
2. Step 2: Convert to fraction form
   1,667.26/2,502.33 = 641.98/x
3. Step 3: Cross multiply
   1,667.26x = 2,502.33 × 641.98
4. Step 4: Simplify right side
   1,667.26x = 1,606,445.81
5. Step 5: Solve for x
   x = 1,606,445.81/1,667.26
6. Step 6: Final answer
   x = 963.52