Finding the Fourth Proportional to 12,012.84, 18,011.50 and 4,997.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,012.84 : 18,011.50 = 4,997.69 : x
2. Step 2: Convert to fraction form
   12,012.84/18,011.50 = 4,997.69/x
3. Step 3: Cross multiply
   12,012.84x = 18,011.50 × 4,997.69
4. Step 4: Simplify right side
   12,012.84x = 90,015,858.43
5. Step 5: Solve for x
   x = 90,015,858.43/12,012.84
6. Step 6: Final answer
   x = 7,493.30