Finding the Fourth Proportional to 12,426,128.69, 18,640,270.44 and 3,792,173.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,426,128.69 : 18,640,270.44 = 3,792,173.13 : x
2. Step 2: Convert to fraction form
   12,426,128.69/18,640,270.44 = 3,792,173.13/x
3. Step 3: Cross multiply
   12,426,128.69x = 18,640,270.44 × 3,792,173.13
4. Step 4: Simplify right side
   12,426,128.69x = 70,687,132,698,501.28
5. Step 5: Solve for x
   x = 70,687,132,698,501.28/12,426,128.69
6. Step 6: Final answer
   x = 5,688,588.50