Finding the Fourth Proportional to 10,407.89, 15,611.37 and 3,012.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,407.89 : 15,611.37 = 3,012.18 : x
2. Step 2: Convert to fraction form
   10,407.89/15,611.37 = 3,012.18/x
3. Step 3: Cross multiply
   10,407.89x = 15,611.37 × 3,012.18
4. Step 4: Simplify right side
   10,407.89x = 47,024,326.32
5. Step 5: Solve for x
   x = 47,024,326.32/10,407.89
6. Step 6: Final answer
   x = 4,518.14