Finding the Fourth Proportional to 1,385.58, 1,910.34 and 980.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.58 : 1,910.34 = 980.94 : x
2. Step 2: Convert to fraction form
   1,385.58/1,910.34 = 980.94/x
3. Step 3: Cross multiply
   1,385.58x = 1,910.34 × 980.94
4. Step 4: Simplify right side
   1,385.58x = 1,873,928.92
5. Step 5: Solve for x
   x = 1,873,928.92/1,385.58
6. Step 6: Final answer
   x = 1,352.45