Finding the Fourth Proportional to 70,514.72, 105,771.36 and 21,266.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,514.72 : 105,771.36 = 21,266.72 : x
2. Step 2: Convert to fraction form
   70,514.72/105,771.36 = 21,266.72/x
3. Step 3: Cross multiply
   70,514.72x = 105,771.36 × 21,266.72
4. Step 4: Simplify right side
   70,514.72x = 2,249,409,897.14
5. Step 5: Solve for x
   x = 2,249,409,897.14/70,514.72
6. Step 6: Final answer
   x = 31,899.86