Finding the Fourth Proportional to 1,189.94, 1,641.27 and 875.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189.94 : 1,641.27 = 875.30 : x
2. Step 2: Convert to fraction form
   1,189.94/1,641.27 = 875.30/x
3. Step 3: Cross multiply
   1,189.94x = 1,641.27 × 875.30
4. Step 4: Simplify right side
   1,189.94x = 1,436,603.63
5. Step 5: Solve for x
   x = 1,436,603.63/1,189.94
6. Step 6: Final answer
   x = 1,207.29