Finding the Fourth Proportional to 39,171.60, 58,799.52 and 21,636.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,171.60 : 58,799.52 = 21,636.72 : x
2. Step 2: Convert to fraction form
   39,171.60/58,799.52 = 21,636.72/x
3. Step 3: Cross multiply
   39,171.60x = 58,799.52 × 21,636.72
4. Step 4: Simplify right side
   39,171.60x = 1,272,228,750.37
5. Step 5: Solve for x
   x = 1,272,228,750.37/39,171.60
6. Step 6: Final answer
   x = 32,478.35