Finding the Fourth Proportional to 1,229,353.57, 1,696,528.83 and 678,132.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229,353.57 : 1,696,528.83 = 678,132.55 : x
2. Step 2: Convert to fraction form
   1,229,353.57/1,696,528.83 = 678,132.55/x
3. Step 3: Cross multiply
   1,229,353.57x = 1,696,528.83 × 678,132.55
4. Step 4: Simplify right side
   1,229,353.57x = 1,150,471,421,636.42
5. Step 5: Solve for x
   x = 1,150,471,421,636.42/1,229,353.57
6. Step 6: Final answer
   x = 935,834.45