Finding the Fourth Proportional to 1,552.90, 2,142.89 and 854.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,552.90 : 2,142.89 = 854.32 : x
2. Step 2: Convert to fraction form
   1,552.90/2,142.89 = 854.32/x
3. Step 3: Cross multiply
   1,552.90x = 2,142.89 × 854.32
4. Step 4: Simplify right side
   1,552.90x = 1,830,709.51
5. Step 5: Solve for x
   x = 1,830,709.51/1,552.90
6. Step 6: Final answer
   x = 1,178.90