Finding the Fourth Proportional to 1,435.42, 1,980.67 and 875.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.42 : 1,980.67 = 875.91 : x
2. Step 2: Convert to fraction form
   1,435.42/1,980.67 = 875.91/x
3. Step 3: Cross multiply
   1,435.42x = 1,980.67 × 875.91
4. Step 4: Simplify right side
   1,435.42x = 1,734,884.28
5. Step 5: Solve for x
   x = 1,734,884.28/1,435.42
6. Step 6: Final answer
   x = 1,208.63