Finding the Fourth Proportional to 21,955,667.68, 30,288,885.42 and 13,251,057.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,955,667.68 : 30,288,885.42 = 13,251,057.76 : x
2. Step 2: Convert to fraction form
   21,955,667.68/30,288,885.42 = 13,251,057.76/x
3. Step 3: Cross multiply
   21,955,667.68x = 30,288,885.42 × 13,251,057.76
4. Step 4: Simplify right side
   21,955,667.68x = 401,359,770,186,441.88
5. Step 5: Solve for x
   x = 401,359,770,186,441.88/21,955,667.68
6. Step 6: Final answer
   x = 18,280,462.98