Finding the Fourth Proportional to 10,929,039.21, 16,380,495.14 and 5,085,331.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,929,039.21 : 16,380,495.14 = 5,085,331.47 : x
2. Step 2: Convert to fraction form
   10,929,039.21/16,380,495.14 = 5,085,331.47/x
3. Step 3: Cross multiply
   10,929,039.21x = 16,380,495.14 × 5,085,331.47
4. Step 4: Simplify right side
   10,929,039.21x = 83,300,247,404,197.39
5. Step 5: Solve for x
   x = 83,300,247,404,197.39/10,929,039.21
6. Step 6: Final answer
   x = 7,621,918.62