Finding the Fourth Proportional to 2,476.38, 3,417.72 and 1,428.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,476.38 : 3,417.72 = 1,428.50 : x
2. Step 2: Convert to fraction form
   2,476.38/3,417.72 = 1,428.50/x
3. Step 3: Cross multiply
   2,476.38x = 3,417.72 × 1,428.50
4. Step 4: Simplify right side
   2,476.38x = 4,882,213.02
5. Step 5: Solve for x
   x = 4,882,213.02/2,476.38
6. Step 6: Final answer
   x = 1,971.51