Finding the Fourth Proportional to 1,535.32, 2,118.67 and 872.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,535.32 : 2,118.67 = 872.34 : x
2. Step 2: Convert to fraction form
   1,535.32/2,118.67 = 872.34/x
3. Step 3: Cross multiply
   1,535.32x = 2,118.67 × 872.34
4. Step 4: Simplify right side
   1,535.32x = 1,848,200.59
5. Step 5: Solve for x
   x = 1,848,200.59/1,535.32
6. Step 6: Final answer
   x = 1,203.79