Finding the Fourth Proportional to 1,360.73, 1,875.61 and 917.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.73 : 1,875.61 = 917.87 : x
2. Step 2: Convert to fraction form
   1,360.73/1,875.61 = 917.87/x
3. Step 3: Cross multiply
   1,360.73x = 1,875.61 × 917.87
4. Step 4: Simplify right side
   1,360.73x = 1,721,566.15
5. Step 5: Solve for x
   x = 1,721,566.15/1,360.73
6. Step 6: Final answer
   x = 1,265.18