Finding the Fourth Proportional to 1,547.45, 2,135.50 and 918.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,547.45 : 2,135.50 = 918.30 : x
2. Step 2: Convert to fraction form
   1,547.45/2,135.50 = 918.30/x
3. Step 3: Cross multiply
   1,547.45x = 2,135.50 × 918.30
4. Step 4: Simplify right side
   1,547.45x = 1,961,019.72
5. Step 5: Solve for x
   x = 1,961,019.72/1,547.45
6. Step 6: Final answer
   x = 1,267.26