Finding the Fourth Proportional to 1,381.34, 2,061.90 and 1,217.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.34 : 2,061.90 = 1,217.32 : x
2. Step 2: Convert to fraction form
   1,381.34/2,061.90 = 1,217.32/x
3. Step 3: Cross multiply
   1,381.34x = 2,061.90 × 1,217.32
4. Step 4: Simplify right side
   1,381.34x = 2,509,981.80
5. Step 5: Solve for x
   x = 2,509,981.80/1,381.34
6. Step 6: Final answer
   x = 1,817.06