Finding the Fourth Proportional to 1,385.32, 1,910.75 and 825.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.32 : 1,910.75 = 825.35 : x
2. Step 2: Convert to fraction form
   1,385.32/1,910.75 = 825.35/x
3. Step 3: Cross multiply
   1,385.32x = 1,910.75 × 825.35
4. Step 4: Simplify right side
   1,385.32x = 1,577,037.51
5. Step 5: Solve for x
   x = 1,577,037.51/1,385.32
6. Step 6: Final answer
   x = 1,138.40