Finding the Fourth Proportional to 1,381.55, 1,906.49 and 1,010.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.55 : 1,906.49 = 1,010.10 : x
2. Step 2: Convert to fraction form
   1,381.55/1,906.49 = 1,010.10/x
3. Step 3: Cross multiply
   1,381.55x = 1,906.49 × 1,010.10
4. Step 4: Simplify right side
   1,381.55x = 1,925,740.92
5. Step 5: Solve for x
   x = 1,925,740.92/1,381.55
6. Step 6: Final answer
   x = 1,393.90