Finding the Fourth Proportional to 1,178,986.51, 1,768,586.69 and 326,111.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178,986.51 : 1,768,586.69 = 326,111.59 : x
2. Step 2: Convert to fraction form
   1,178,986.51/1,768,586.69 = 326,111.59/x
3. Step 3: Cross multiply
   1,178,986.51x = 1,768,586.69 × 326,111.59
4. Step 4: Simplify right side
   1,178,986.51x = 576,756,617,528.74
5. Step 5: Solve for x
   x = 576,756,617,528.74/1,178,986.51
6. Step 6: Final answer
   x = 489,196.96