Finding the Fourth Proportional to 1,542.17, 2,128.15 and 843.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,542.17 : 2,128.15 = 843.50 : x
2. Step 2: Convert to fraction form
   1,542.17/2,128.15 = 843.50/x
3. Step 3: Cross multiply
   1,542.17x = 2,128.15 × 843.50
4. Step 4: Simplify right side
   1,542.17x = 1,795,094.53
5. Step 5: Solve for x
   x = 1,795,094.53/1,542.17
6. Step 6: Final answer
   x = 1,164.01