Finding the Fourth Proportional to 33,688.89, 50,502.72 and 21,171

Step by Step Solution

1. Step 1: Write the proportion equation
   33,688.89 : 50,502.72 = 21,171 : x
2. Step 2: Convert to fraction form
   33,688.89/50,502.72 = 21,171/x
3. Step 3: Cross multiply
   33,688.89x = 50,502.72 × 21,171
4. Step 4: Simplify right side
   33,688.89x = 1,069,193,085.12
5. Step 5: Solve for x
   x = 1,069,193,085.12/33,688.89
6. Step 6: Final answer
   x = 31,737.26