Finding the Fourth Proportional to 1,909.86, 2,635.54 and 1,123.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.86 : 2,635.54 = 1,123.95 : x
2. Step 2: Convert to fraction form
   1,909.86/2,635.54 = 1,123.95/x
3. Step 3: Cross multiply
   1,909.86x = 2,635.54 × 1,123.95
4. Step 4: Simplify right side
   1,909.86x = 2,962,215.18
5. Step 5: Solve for x
   x = 2,962,215.18/1,909.86
6. Step 6: Final answer
   x = 1,551.01