Finding the Fourth Proportional to 1,088.34, 1,501.82 and 646.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.34 : 1,501.82 = 646.17 : x
2. Step 2: Convert to fraction form
   1,088.34/1,501.82 = 646.17/x
3. Step 3: Cross multiply
   1,088.34x = 1,501.82 × 646.17
4. Step 4: Simplify right side
   1,088.34x = 970,427.80
5. Step 5: Solve for x
   x = 970,427.80/1,088.34
6. Step 6: Final answer
   x = 891.66