Finding the Fourth Proportional to 1,395.45, 1,925.88 and 836.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.45 : 1,925.88 = 836.10 : x
2. Step 2: Convert to fraction form
   1,395.45/1,925.88 = 836.10/x
3. Step 3: Cross multiply
   1,395.45x = 1,925.88 × 836.10
4. Step 4: Simplify right side
   1,395.45x = 1,610,228.27
5. Step 5: Solve for x
   x = 1,610,228.27/1,395.45
6. Step 6: Final answer
   x = 1,153.91