Finding the Fourth Proportional to 19,019.71, 26,238.35 and 12,307.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,019.71 : 26,238.35 = 12,307.50 : x
2. Step 2: Convert to fraction form
   19,019.71/26,238.35 = 12,307.50/x
3. Step 3: Cross multiply
   19,019.71x = 26,238.35 × 12,307.50
4. Step 4: Simplify right side
   19,019.71x = 322,928,492.63
5. Step 5: Solve for x
   x = 322,928,492.63/19,019.71
6. Step 6: Final answer
   x = 16,978.62