Finding the Fourth Proportional to 12,692.19, 19,042.17 and 5,678.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,692.19 : 19,042.17 = 5,678.10 : x
2. Step 2: Convert to fraction form
   12,692.19/19,042.17 = 5,678.10/x
3. Step 3: Cross multiply
   12,692.19x = 19,042.17 × 5,678.10
4. Step 4: Simplify right side
   12,692.19x = 108,123,345.48
5. Step 5: Solve for x
   x = 108,123,345.48/12,692.19
6. Step 6: Final answer
   x = 8,518.89