Finding the Fourth Proportional to 1,908.50, 2,630.88 and 1,277.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,908.50 : 2,630.88 = 1,277.91 : x
2. Step 2: Convert to fraction form
   1,908.50/2,630.88 = 1,277.91/x
3. Step 3: Cross multiply
   1,908.50x = 2,630.88 × 1,277.91
4. Step 4: Simplify right side
   1,908.50x = 3,362,027.86
5. Step 5: Solve for x
   x = 3,362,027.86/1,908.50
6. Step 6: Final answer
   x = 1,761.61