Finding the Fourth Proportional to 1,401.89, 1,935.38 and 842.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.89 : 1,935.38 = 842.50 : x
2. Step 2: Convert to fraction form
   1,401.89/1,935.38 = 842.50/x
3. Step 3: Cross multiply
   1,401.89x = 1,935.38 × 842.50
4. Step 4: Simplify right side
   1,401.89x = 1,630,547.97
5. Step 5: Solve for x
   x = 1,630,547.97/1,401.89
6. Step 6: Final answer
   x = 1,163.11