Finding the Fourth Proportional to 12,998,328, 17,938,308.96 and 7,841,578.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,998,328 : 17,938,308.96 = 7,841,578.96 : x
2. Step 2: Convert to fraction form
   12,998,328/17,938,308.96 = 7,841,578.96/x
3. Step 3: Cross multiply
   12,998,328x = 17,938,308.96 × 7,841,578.96
4. Step 4: Simplify right side
   12,998,328x = 140,664,666,118,715.48
5. Step 5: Solve for x
   x = 140,664,666,118,715.48/12,998,328
6. Step 6: Final answer
   x = 10,821,750.78