Finding the Fourth Proportional to 1,428.42, 1,970.01 and 1,097.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.42 : 1,970.01 = 1,097.66 : x
2. Step 2: Convert to fraction form
   1,428.42/1,970.01 = 1,097.66/x
3. Step 3: Cross multiply
   1,428.42x = 1,970.01 × 1,097.66
4. Step 4: Simplify right side
   1,428.42x = 2,162,401.18
5. Step 5: Solve for x
   x = 2,162,401.18/1,428.42
6. Step 6: Final answer
   x = 1,513.84