Finding the Fourth Proportional to 1,990.48, 2,746.96 and 1,401.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.48 : 2,746.96 = 1,401.12 : x
2. Step 2: Convert to fraction form
   1,990.48/2,746.96 = 1,401.12/x
3. Step 3: Cross multiply
   1,990.48x = 2,746.96 × 1,401.12
4. Step 4: Simplify right side
   1,990.48x = 3,848,820.60
5. Step 5: Solve for x
   x = 3,848,820.60/1,990.48
6. Step 6: Final answer
   x = 1,933.61