Finding the Fourth Proportional to 19,607.42, 27,069.42 and 12,912.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,607.42 : 27,069.42 = 12,912.50 : x
2. Step 2: Convert to fraction form
   19,607.42/27,069.42 = 12,912.50/x
3. Step 3: Cross multiply
   19,607.42x = 27,069.42 × 12,912.50
4. Step 4: Simplify right side
   19,607.42x = 349,533,885.75
5. Step 5: Solve for x
   x = 349,533,885.75/19,607.42
6. Step 6: Final answer
   x = 17,826.61