Finding the Fourth Proportional to 31,832.79, 47,715.89 and 17,772.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,832.79 : 47,715.89 = 17,772.20 : x
2. Step 2: Convert to fraction form
   31,832.79/47,715.89 = 17,772.20/x
3. Step 3: Cross multiply
   31,832.79x = 47,715.89 × 17,772.20
4. Step 4: Simplify right side
   31,832.79x = 848,016,012.82
5. Step 5: Solve for x
   x = 848,016,012.82/31,832.79
6. Step 6: Final answer
   x = 26,639.70