Finding the Fourth Proportional to 12,791.50, 19,188.33 and 3,557.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,791.50 : 19,188.33 = 3,557.50 : x
2. Step 2: Convert to fraction form
   12,791.50/19,188.33 = 3,557.50/x
3. Step 3: Cross multiply
   12,791.50x = 19,188.33 × 3,557.50
4. Step 4: Simplify right side
   12,791.50x = 68,262,483.98
5. Step 5: Solve for x
   x = 68,262,483.98/12,791.50
6. Step 6: Final answer
   x = 5,336.55