Finding the Fourth Proportional to 1,123.86, 1,685.58 and 760.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.86 : 1,685.58 = 760.98 : x
2. Step 2: Convert to fraction form
   1,123.86/1,685.58 = 760.98/x
3. Step 3: Cross multiply
   1,123.86x = 1,685.58 × 760.98
4. Step 4: Simplify right side
   1,123.86x = 1,282,692.67
5. Step 5: Solve for x
   x = 1,282,692.67/1,123.86
6. Step 6: Final answer
   x = 1,141.33