Finding the Fourth Proportional to 8,971.98, 13,458 and 3,124.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,971.98 : 13,458 = 3,124.50 : x
2. Step 2: Convert to fraction form
   8,971.98/13,458 = 3,124.50/x
3. Step 3: Cross multiply
   8,971.98x = 13,458 × 3,124.50
4. Step 4: Simplify right side
   8,971.98x = 42,049,521
5. Step 5: Solve for x
   x = 42,049,521/8,971.98
6. Step 6: Final answer
   x = 4,686.76