Finding the Fourth Proportional to 876,870.20, 1,317,273.60 and 843,409.10

Step by Step Solution

1. Step 1: Write the proportion equation
   876,870.20 : 1,317,273.60 = 843,409.10 : x
2. Step 2: Convert to fraction form
   876,870.20/1,317,273.60 = 843,409.10/x
3. Step 3: Cross multiply
   876,870.20x = 1,317,273.60 × 843,409.10
4. Step 4: Simplify right side
   876,870.20x = 1,111,000,541,429.76
5. Step 5: Solve for x
   x = 1,111,000,541,429.76/876,870.20
6. Step 6: Final answer
   x = 1,267,006.84