Finding the Fourth Proportional to 55,426,147.28, 83,143,871.94 and 20,420,792

Step by Step Solution

1. Step 1: Write the proportion equation
   55,426,147.28 : 83,143,871.94 = 20,420,792 : x
2. Step 2: Convert to fraction form
   55,426,147.28/83,143,871.94 = 20,420,792/x
3. Step 3: Cross multiply
   55,426,147.28x = 83,143,871.94 × 20,420,792
4. Step 4: Simplify right side
   55,426,147.28x = 1,697,863,714,961,376.50
5. Step 5: Solve for x
   x = 1,697,863,714,961,376.50/55,426,147.28
6. Step 6: Final answer
   x = 30,632,901.59