Finding the Fourth Proportional to 31,621.89, 47,435.63 and 8,248.53

Step by Step Solution

1. Step 1: Write the proportion equation
   31,621.89 : 47,435.63 = 8,248.53 : x
2. Step 2: Convert to fraction form
   31,621.89/47,435.63 = 8,248.53/x
3. Step 3: Cross multiply
   31,621.89x = 47,435.63 × 8,248.53
4. Step 4: Simplify right side
   31,621.89x = 391,274,175.88
5. Step 5: Solve for x
   x = 391,274,175.88/31,621.89
6. Step 6: Final answer
   x = 12,373.52