Finding the Fourth Proportional to 30,500.80, 45,746.55 and 8,315.98

Step by Step Solution

1. Step 1: Write the proportion equation
   30,500.80 : 45,746.55 = 8,315.98 : x
2. Step 2: Convert to fraction form
   30,500.80/45,746.55 = 8,315.98/x
3. Step 3: Cross multiply
   30,500.80x = 45,746.55 × 8,315.98
4. Step 4: Simplify right side
   30,500.80x = 380,427,394.87
5. Step 5: Solve for x
   x = 380,427,394.87/30,500.80
6. Step 6: Final answer
   x = 12,472.70