Finding the Fourth Proportional to 31,864.14, 47,820.78 and 17,085.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,864.14 : 47,820.78 = 17,085.42 : x
2. Step 2: Convert to fraction form
   31,864.14/47,820.78 = 17,085.42/x
3. Step 3: Cross multiply
   31,864.14x = 47,820.78 × 17,085.42
4. Step 4: Simplify right side
   31,864.14x = 817,038,111.03
5. Step 5: Solve for x
   x = 817,038,111.03/31,864.14
6. Step 6: Final answer
   x = 25,641.30