Finding the Fourth Proportional to 1,381.55, 2,068.22 and 917.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.55 : 2,068.22 = 917.73 : x
2. Step 2: Convert to fraction form
   1,381.55/2,068.22 = 917.73/x
3. Step 3: Cross multiply
   1,381.55x = 2,068.22 × 917.73
4. Step 4: Simplify right side
   1,381.55x = 1,898,062.95
5. Step 5: Solve for x
   x = 1,898,062.95/1,381.55
6. Step 6: Final answer
   x = 1,373.87