Finding the Fourth Proportional to 21,061,091.63, 31,534,866.78 and 13,756,462.79

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061,091.63 : 31,534,866.78 = 13,756,462.79 : x
2. Step 2: Convert to fraction form
   21,061,091.63/31,534,866.78 = 13,756,462.79/x
3. Step 3: Cross multiply
   21,061,091.63x = 31,534,866.78 × 13,756,462.79
4. Step 4: Simplify right side
   21,061,091.63x = 433,808,221,289,002.81
5. Step 5: Solve for x
   x = 433,808,221,289,002.81/21,061,091.63
6. Step 6: Final answer
   x = 20,597,613.32