Finding the Fourth Proportional to 1,360.85, 1,875.74 and 917.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.85 : 1,875.74 = 917.98 : x
2. Step 2: Convert to fraction form
   1,360.85/1,875.74 = 917.98/x
3. Step 3: Cross multiply
   1,360.85x = 1,875.74 × 917.98
4. Step 4: Simplify right side
   1,360.85x = 1,721,889.41
5. Step 5: Solve for x
   x = 1,721,889.41/1,360.85
6. Step 6: Final answer
   x = 1,265.31