Finding the Fourth Proportional to 1,128.89, 1,693.32 and 307.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.89 : 1,693.32 = 307.16 : x
2. Step 2: Convert to fraction form
   1,128.89/1,693.32 = 307.16/x
3. Step 3: Cross multiply
   1,128.89x = 1,693.32 × 307.16
4. Step 4: Simplify right side
   1,128.89x = 520,116.90
5. Step 5: Solve for x
   x = 520,116.90/1,128.89
6. Step 6: Final answer
   x = 460.73