Finding the Fourth Proportional to 1,081.48, 1,492.32 and 661.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.48 : 1,492.32 = 661.93 : x
2. Step 2: Convert to fraction form
   1,081.48/1,492.32 = 661.93/x
3. Step 3: Cross multiply
   1,081.48x = 1,492.32 × 661.93
4. Step 4: Simplify right side
   1,081.48x = 987,811.38
5. Step 5: Solve for x
   x = 987,811.38/1,081.48
6. Step 6: Final answer
   x = 913.39