Finding the Fourth Proportional to 8,990.89, 12,407.67 and 5,012.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,990.89 : 12,407.67 = 5,012.27 : x
2. Step 2: Convert to fraction form
   8,990.89/12,407.67 = 5,012.27/x
3. Step 3: Cross multiply
   8,990.89x = 12,407.67 × 5,012.27
4. Step 4: Simplify right side
   8,990.89x = 62,190,592.11
5. Step 5: Solve for x
   x = 62,190,592.11/8,990.89
6. Step 6: Final answer
   x = 6,917.07