Finding the Fourth Proportional to 8,912.96, 12,300.05 and 5,135.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,912.96 : 12,300.05 = 5,135.49 : x
2. Step 2: Convert to fraction form
   8,912.96/12,300.05 = 5,135.49/x
3. Step 3: Cross multiply
   8,912.96x = 12,300.05 × 5,135.49
4. Step 4: Simplify right side
   8,912.96x = 63,166,779.32
5. Step 5: Solve for x
   x = 63,166,779.32/8,912.96
6. Step 6: Final answer
   x = 7,087.07