Finding the Fourth Proportional to 12,128.59, 18,199.70 and 4,733.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,128.59 : 18,199.70 = 4,733.56 : x
2. Step 2: Convert to fraction form
   12,128.59/18,199.70 = 4,733.56/x
3. Step 3: Cross multiply
   12,128.59x = 18,199.70 × 4,733.56
4. Step 4: Simplify right side
   12,128.59x = 86,149,257.27
5. Step 5: Solve for x
   x = 86,149,257.27/12,128.59
6. Step 6: Final answer
   x = 7,102.99