Finding the Fourth Proportional to 12,692.72, 19,038.36 and 3,458

Step by Step Solution

1. Step 1: Write the proportion equation
   12,692.72 : 19,038.36 = 3,458 : x
2. Step 2: Convert to fraction form
   12,692.72/19,038.36 = 3,458/x
3. Step 3: Cross multiply
   12,692.72x = 19,038.36 × 3,458
4. Step 4: Simplify right side
   12,692.72x = 65,834,648.88
5. Step 5: Solve for x
   x = 65,834,648.88/12,692.72
6. Step 6: Final answer
   x = 5,186.80