Finding the Fourth Proportional to 21,841,630.90, 32,787,329.55 and 12,871,237.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,841,630.90 : 32,787,329.55 = 12,871,237.30 : x
2. Step 2: Convert to fraction form
   21,841,630.90/32,787,329.55 = 12,871,237.30/x
3. Step 3: Cross multiply
   21,841,630.90x = 32,787,329.55 × 12,871,237.30
4. Step 4: Simplify right side
   21,841,630.90x = 422,013,499,071,352.25
5. Step 5: Solve for x
   x = 422,013,499,071,352.25/21,841,630.90
6. Step 6: Final answer
   x = 19,321,519.58