Finding the Fourth Proportional to 1,111.80, 1,530.69 and 914.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.80 : 1,530.69 = 914.96 : x
2. Step 2: Convert to fraction form
   1,111.80/1,530.69 = 914.96/x
3. Step 3: Cross multiply
   1,111.80x = 1,530.69 × 914.96
4. Step 4: Simplify right side
   1,111.80x = 1,400,520.12
5. Step 5: Solve for x
   x = 1,400,520.12/1,111.80
6. Step 6: Final answer
   x = 1,259.69