Finding the Fourth Proportional to 22,742.68, 31,380.72 and 12,670.86

Step by Step Solution

1. Step 1: Write the proportion equation
   22,742.68 : 31,380.72 = 12,670.86 : x
2. Step 2: Convert to fraction form
   22,742.68/31,380.72 = 12,670.86/x
3. Step 3: Cross multiply
   22,742.68x = 31,380.72 × 12,670.86
4. Step 4: Simplify right side
   22,742.68x = 397,620,709.82
5. Step 5: Solve for x
   x = 397,620,709.82/22,742.68
6. Step 6: Final answer
   x = 17,483.46