Finding the Fourth Proportional to 1,315,690.72, 1,815,653.16 and 712,078.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315,690.72 : 1,815,653.16 = 712,078.72 : x
2. Step 2: Convert to fraction form
   1,315,690.72/1,815,653.16 = 712,078.72/x
3. Step 3: Cross multiply
   1,315,690.72x = 1,815,653.16 × 712,078.72
4. Step 4: Simplify right side
   1,315,690.72x = 1,292,887,978,136.76
5. Step 5: Solve for x
   x = 1,292,887,978,136.76/1,315,690.72
6. Step 6: Final answer
   x = 982,668.62