Finding the Fourth Proportional to 53,159.34, 79,742.52 and 17,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,159.34 : 79,742.52 = 17,620.50 : x
2. Step 2: Convert to fraction form
   53,159.34/79,742.52 = 17,620.50/x
3. Step 3: Cross multiply
   53,159.34x = 79,742.52 × 17,620.50
4. Step 4: Simplify right side
   53,159.34x = 1,405,103,073.66
5. Step 5: Solve for x
   x = 1,405,103,073.66/53,159.34
6. Step 6: Final answer
   x = 26,431.91