Finding the Fourth Proportional to 21,019,738.99, 29,008,100.61 and 13,281,958.03

Step by Step Solution

1. Step 1: Write the proportion equation
   21,019,738.99 : 29,008,100.61 = 13,281,958.03 : x
2. Step 2: Convert to fraction form
   21,019,738.99/29,008,100.61 = 13,281,958.03/x
3. Step 3: Cross multiply
   21,019,738.99x = 29,008,100.61 × 13,281,958.03
4. Step 4: Simplify right side
   21,019,738.99x = 385,284,374,832,037.38
5. Step 5: Solve for x
   x = 385,284,374,832,037.38/21,019,738.99
6. Step 6: Final answer
   x = 18,329,646.01