Finding the Fourth Proportional to 31,409.34, 43,326.72 and 18,826.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,409.34 : 43,326.72 = 18,826.80 : x
2. Step 2: Convert to fraction form
   31,409.34/43,326.72 = 18,826.80/x
3. Step 3: Cross multiply
   31,409.34x = 43,326.72 × 18,826.80
4. Step 4: Simplify right side
   31,409.34x = 815,703,492.10
5. Step 5: Solve for x
   x = 815,703,492.10/31,409.34
6. Step 6: Final answer
   x = 25,970.09