Finding the Fourth Proportional to 12,788,969.71, 17,648,751.06 and 6,987,793.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788,969.71 : 17,648,751.06 = 6,987,793.05 : x
2. Step 2: Convert to fraction form
   12,788,969.71/17,648,751.06 = 6,987,793.05/x
3. Step 3: Cross multiply
   12,788,969.71x = 17,648,751.06 × 6,987,793.05
4. Step 4: Simplify right side
   12,788,969.71x = 123,325,819,998,248.12
5. Step 5: Solve for x
   x = 123,325,819,998,248.12/12,788,969.71
6. Step 6: Final answer
   x = 9,643,139.58