Finding the Fourth Proportional to 1,152.18, 1,590.93 and 920.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.18 : 1,590.93 = 920.34 : x
2. Step 2: Convert to fraction form
   1,152.18/1,590.93 = 920.34/x
3. Step 3: Cross multiply
   1,152.18x = 1,590.93 × 920.34
4. Step 4: Simplify right side
   1,152.18x = 1,464,196.52
5. Step 5: Solve for x
   x = 1,464,196.52/1,152.18
6. Step 6: Final answer
   x = 1,270.81