Finding the Fourth Proportional to 8,637.12, 12,958.02 and 3,091.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,637.12 : 12,958.02 = 3,091.05 : x
2. Step 2: Convert to fraction form
   8,637.12/12,958.02 = 3,091.05/x
3. Step 3: Cross multiply
   8,637.12x = 12,958.02 × 3,091.05
4. Step 4: Simplify right side
   8,637.12x = 40,053,887.72
5. Step 5: Solve for x
   x = 40,053,887.72/8,637.12
6. Step 6: Final answer
   x = 4,637.41