Finding the Fourth Proportional to 1,551.95, 2,141.72 and 853.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,551.95 : 2,141.72 = 853.32 : x
2. Step 2: Convert to fraction form
   1,551.95/2,141.72 = 853.32/x
3. Step 3: Cross multiply
   1,551.95x = 2,141.72 × 853.32
4. Step 4: Simplify right side
   1,551.95x = 1,827,572.51
5. Step 5: Solve for x
   x = 1,827,572.51/1,551.95
6. Step 6: Final answer
   x = 1,177.60