Finding the Fourth Proportional to 1,231,124.50, 1,686,632.69 and 1,185,086.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,231,124.50 : 1,686,632.69 = 1,185,086.31 : x
2. Step 2: Convert to fraction form
   1,231,124.50/1,686,632.69 = 1,185,086.31/x
3. Step 3: Cross multiply
   1,231,124.50x = 1,686,632.69 × 1,185,086.31
4. Step 4: Simplify right side
   1,231,124.50x = 1,998,805,317,042.63
5. Step 5: Solve for x
   x = 1,998,805,317,042.63/1,231,124.50
6. Step 6: Final answer
   x = 1,623,560.67