Finding the Fourth Proportional to 1,189,826.32, 1,641,960.31 and 645,962.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189,826.32 : 1,641,960.31 = 645,962.10 : x
2. Step 2: Convert to fraction form
   1,189,826.32/1,641,960.31 = 645,962.10/x
3. Step 3: Cross multiply
   1,189,826.32x = 1,641,960.31 × 645,962.10
4. Step 4: Simplify right side
   1,189,826.32x = 1,060,644,129,964.25
5. Step 5: Solve for x
   x = 1,060,644,129,964.25/1,189,826.32
6. Step 6: Final answer
   x = 891,427.69