Finding the Fourth Proportional to 1,520.67, 2,097.48 and 931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.67 : 2,097.48 = 931.50 : x
2. Step 2: Convert to fraction form
   1,520.67/2,097.48 = 931.50/x
3. Step 3: Cross multiply
   1,520.67x = 2,097.48 × 931.50
4. Step 4: Simplify right side
   1,520.67x = 1,953,802.62
5. Step 5: Solve for x
   x = 1,953,802.62/1,520.67
6. Step 6: Final answer
   x = 1,284.83