Finding the Fourth Proportional to 21,871.91, 32,786.73 and 7,070.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,871.91 : 32,786.73 = 7,070.78 : x
2. Step 2: Convert to fraction form
   21,871.91/32,786.73 = 7,070.78/x
3. Step 3: Cross multiply
   21,871.91x = 32,786.73 × 7,070.78
4. Step 4: Simplify right side
   21,871.91x = 231,827,590.82
5. Step 5: Solve for x
   x = 231,827,590.82/21,871.91
6. Step 6: Final answer
   x = 10,599.33