Finding the Fourth Proportional to 1,088.15, 1,501.56 and 715.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.15 : 1,501.56 = 715.86 : x
2. Step 2: Convert to fraction form
   1,088.15/1,501.56 = 715.86/x
3. Step 3: Cross multiply
   1,088.15x = 1,501.56 × 715.86
4. Step 4: Simplify right side
   1,088.15x = 1,074,906.74
5. Step 5: Solve for x
   x = 1,074,906.74/1,088.15
6. Step 6: Final answer
   x = 987.83