Finding the Fourth Proportional to 20,231,111.37, 27,921,484.17 and 13,267,645.05

Step by Step Solution

1. Step 1: Write the proportion equation
   20,231,111.37 : 27,921,484.17 = 13,267,645.05 : x
2. Step 2: Convert to fraction form
   20,231,111.37/27,921,484.17 = 13,267,645.05/x
3. Step 3: Cross multiply
   20,231,111.37x = 27,921,484.17 × 13,267,645.05
4. Step 4: Simplify right side
   20,231,111.37x = 370,452,341,236,753.88
5. Step 5: Solve for x
   x = 370,452,341,236,753.88/20,231,111.37
6. Step 6: Final answer
   x = 18,311,022.78