Finding the Fourth Proportional to 31,670.55, 43,710.72 and 18,239.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,670.55 : 43,710.72 = 18,239.34 : x
2. Step 2: Convert to fraction form
   31,670.55/43,710.72 = 18,239.34/x
3. Step 3: Cross multiply
   31,670.55x = 43,710.72 × 18,239.34
4. Step 4: Simplify right side
   31,670.55x = 797,254,683.72
5. Step 5: Solve for x
   x = 797,254,683.72/31,670.55
6. Step 6: Final answer
   x = 25,173.38