Finding the Fourth Proportional to 22,985.58, 31,720.06 and 12,914.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,985.58 : 31,720.06 = 12,914.30 : x
2. Step 2: Convert to fraction form
   22,985.58/31,720.06 = 12,914.30/x
3. Step 3: Cross multiply
   22,985.58x = 31,720.06 × 12,914.30
4. Step 4: Simplify right side
   22,985.58x = 409,642,370.86
5. Step 5: Solve for x
   x = 409,642,370.86/22,985.58
6. Step 6: Final answer
   x = 17,821.71