Finding the Fourth Proportional to 12,788,968.71, 17,648,749.68 and 6,987,792.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788,968.71 : 17,648,749.68 = 6,987,792.05 : x
2. Step 2: Convert to fraction form
   12,788,968.71/17,648,749.68 = 6,987,792.05/x
3. Step 3: Cross multiply
   12,788,968.71x = 17,648,749.68 × 6,987,792.05
4. Step 4: Simplify right side
   12,788,968.71x = 123,325,792,658,078.89
5. Step 5: Solve for x
   x = 123,325,792,658,078.89/12,788,968.71
6. Step 6: Final answer
   x = 9,643,138.19