Finding the Fourth Proportional to 1,619.55, 2,431.38 and 1,377.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,619.55 : 2,431.38 = 1,377.62 : x
2. Step 2: Convert to fraction form
   1,619.55/2,431.38 = 1,377.62/x
3. Step 3: Cross multiply
   1,619.55x = 2,431.38 × 1,377.62
4. Step 4: Simplify right side
   1,619.55x = 3,349,505.56
5. Step 5: Solve for x
   x = 3,349,505.56/1,619.55
6. Step 6: Final answer
   x = 2,068.17