Finding the Fourth Proportional to 1,499.76, 2,069.52 and 836.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.76 : 2,069.52 = 836.40 : x
2. Step 2: Convert to fraction form
   1,499.76/2,069.52 = 836.40/x
3. Step 3: Cross multiply
   1,499.76x = 2,069.52 × 836.40
4. Step 4: Simplify right side
   1,499.76x = 1,730,946.53
5. Step 5: Solve for x
   x = 1,730,946.53/1,499.76
6. Step 6: Final answer
   x = 1,154.15