Finding the Fourth Proportional to 1,088.36, 1,501.89 and 646.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.36 : 1,501.89 = 646.01 : x
2. Step 2: Convert to fraction form
   1,088.36/1,501.89 = 646.01/x
3. Step 3: Cross multiply
   1,088.36x = 1,501.89 × 646.01
4. Step 4: Simplify right side
   1,088.36x = 970,228.45
5. Step 5: Solve for x
   x = 970,228.45/1,088.36
6. Step 6: Final answer
   x = 891.46