Finding the Fourth Proportional to 1,123.32, 1,549.38 and 913.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.32 : 1,549.38 = 913.50 : x
2. Step 2: Convert to fraction form
   1,123.32/1,549.38 = 913.50/x
3. Step 3: Cross multiply
   1,123.32x = 1,549.38 × 913.50
4. Step 4: Simplify right side
   1,123.32x = 1,415,358.63
5. Step 5: Solve for x
   x = 1,415,358.63/1,123.32
6. Step 6: Final answer
   x = 1,259.98