Finding the Fourth Proportional to 13,139,322, 18,000,568.74 and 12,648,083.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139,322 : 18,000,568.74 = 12,648,083.46 : x
2. Step 2: Convert to fraction form
   13,139,322/18,000,568.74 = 12,648,083.46/x
3. Step 3: Cross multiply
   13,139,322x = 18,000,568.74 × 12,648,083.46
4. Step 4: Simplify right side
   13,139,322x = 227,672,695,750,987.03
5. Step 5: Solve for x
   x = 227,672,695,750,987.03/13,139,322
6. Step 6: Final answer
   x = 17,327,583.25