Finding the Fourth Proportional to 1,366.78, 1,885.14 and 1,071.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.78 : 1,885.14 = 1,071.46 : x
2. Step 2: Convert to fraction form
   1,366.78/1,885.14 = 1,071.46/x
3. Step 3: Cross multiply
   1,366.78x = 1,885.14 × 1,071.46
4. Step 4: Simplify right side
   1,366.78x = 2,019,852.10
5. Step 5: Solve for x
   x = 2,019,852.10/1,366.78
6. Step 6: Final answer
   x = 1,477.82