Finding the Fourth Proportional to 1,189,708.83, 1,641,624.89 and 680,312.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189,708.83 : 1,641,624.89 = 680,312.79 : x
2. Step 2: Convert to fraction form
   1,189,708.83/1,641,624.89 = 680,312.79/x
3. Step 3: Cross multiply
   1,189,708.83x = 1,641,624.89 × 680,312.79
4. Step 4: Simplify right side
   1,189,708.83x = 1,116,818,405,647.78
5. Step 5: Solve for x
   x = 1,116,818,405,647.78/1,189,708.83
6. Step 6: Final answer
   x = 938,732.55