Finding the Fourth Proportional to 31,547.34, 43,540.35 and 18,972.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,547.34 : 43,540.35 = 18,972.09 : x
2. Step 2: Convert to fraction form
   31,547.34/43,540.35 = 18,972.09/x
3. Step 3: Cross multiply
   31,547.34x = 43,540.35 × 18,972.09
4. Step 4: Simplify right side
   31,547.34x = 826,051,438.83
5. Step 5: Solve for x
   x = 826,051,438.83/31,547.34
6. Step 6: Final answer
   x = 26,184.50