Finding the Fourth Proportional to 21,671,918, 32,464,560.72 and 13,031,287.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,671,918 : 32,464,560.72 = 13,031,287.42 : x
2. Step 2: Convert to fraction form
   21,671,918/32,464,560.72 = 13,031,287.42/x
3. Step 3: Cross multiply
   21,671,918x = 32,464,560.72 × 13,031,287.42
4. Step 4: Simplify right side
   21,671,918x = 423,055,021,544,039.31
5. Step 5: Solve for x
   x = 423,055,021,544,039.31/21,671,918
6. Step 6: Final answer
   x = 19,520,885.12