Finding the Fourth Proportional to 9,012.10, 13,519.98 and 3,172.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,012.10 : 13,519.98 = 3,172.84 : x
2. Step 2: Convert to fraction form
   9,012.10/13,519.98 = 3,172.84/x
3. Step 3: Cross multiply
   9,012.10x = 13,519.98 × 3,172.84
4. Step 4: Simplify right side
   9,012.10x = 42,896,733.34
5. Step 5: Solve for x
   x = 42,896,733.34/9,012.10
6. Step 6: Final answer
   x = 4,759.90