Finding the Fourth Proportional to 33,690.79, 50,533.35 and 10,315

Step by Step Solution

1. Step 1: Write the proportion equation
   33,690.79 : 50,533.35 = 10,315 : x
2. Step 2: Convert to fraction form
   33,690.79/50,533.35 = 10,315/x
3. Step 3: Cross multiply
   33,690.79x = 50,533.35 × 10,315
4. Step 4: Simplify right side
   33,690.79x = 521,251,505.25
5. Step 5: Solve for x
   x = 521,251,505.25/33,690.79
6. Step 6: Final answer
   x = 15,471.63