Finding the Fourth Proportional to 1,435.32, 1,980.90 and 875.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.32 : 1,980.90 = 875.88 : x
2. Step 2: Convert to fraction form
   1,435.32/1,980.90 = 875.88/x
3. Step 3: Cross multiply
   1,435.32x = 1,980.90 × 875.88
4. Step 4: Simplify right side
   1,435.32x = 1,735,030.69
5. Step 5: Solve for x
   x = 1,735,030.69/1,435.32
6. Step 6: Final answer
   x = 1,208.81