Finding the Fourth Proportional to 1,976.86, 2,726.31 and 1,277.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,976.86 : 2,726.31 = 1,277.50 : x
2. Step 2: Convert to fraction form
   1,976.86/2,726.31 = 1,277.50/x
3. Step 3: Cross multiply
   1,976.86x = 2,726.31 × 1,277.50
4. Step 4: Simplify right side
   1,976.86x = 3,482,861.03
5. Step 5: Solve for x
   x = 3,482,861.03/1,976.86
6. Step 6: Final answer
   x = 1,761.81