Finding the Fourth Proportional to 1,088.37, 1,501.58 and 715.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.37 : 1,501.58 = 715.32 : x
2. Step 2: Convert to fraction form
   1,088.37/1,501.58 = 715.32/x
3. Step 3: Cross multiply
   1,088.37x = 1,501.58 × 715.32
4. Step 4: Simplify right side
   1,088.37x = 1,074,099.12
5. Step 5: Solve for x
   x = 1,074,099.12/1,088.37
6. Step 6: Final answer
   x = 986.89