Finding the Fourth Proportional to 1,298.42, 1,930.94 and 1,257.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.42 : 1,930.94 = 1,257.41 : x
2. Step 2: Convert to fraction form
   1,298.42/1,930.94 = 1,257.41/x
3. Step 3: Cross multiply
   1,298.42x = 1,930.94 × 1,257.41
4. Step 4: Simplify right side
   1,298.42x = 2,427,967.32
5. Step 5: Solve for x
   x = 2,427,967.32/1,298.42
6. Step 6: Final answer
   x = 1,869.95