Finding the Fourth Proportional to 70,404.18, 105,613.20 and 20,484.78

Step by Step Solution

1. Step 1: Write the proportion equation
   70,404.18 : 105,613.20 = 20,484.78 : x
2. Step 2: Convert to fraction form
   70,404.18/105,613.20 = 20,484.78/x
3. Step 3: Cross multiply
   70,404.18x = 105,613.20 × 20,484.78
4. Step 4: Simplify right side
   70,404.18x = 2,163,463,167.10
5. Step 5: Solve for x
   x = 2,163,463,167.10/70,404.18
6. Step 6: Final answer
   x = 30,729.19