Finding the Fourth Proportional to 1,906.03, 2,630.78 and 1,207

Step by Step Solution

1. Step 1: Write the proportion equation
   1,906.03 : 2,630.78 = 1,207 : x
2. Step 2: Convert to fraction form
   1,906.03/2,630.78 = 1,207/x
3. Step 3: Cross multiply
   1,906.03x = 2,630.78 × 1,207
4. Step 4: Simplify right side
   1,906.03x = 3,175,351.46
5. Step 5: Solve for x
   x = 3,175,351.46/1,906.03
6. Step 6: Final answer
   x = 1,665.95