Finding the Fourth Proportional to 13,123.82, 19,689.06 and 4,358.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123.82 : 19,689.06 = 4,358.78 : x
2. Step 2: Convert to fraction form
   13,123.82/19,689.06 = 4,358.78/x
3. Step 3: Cross multiply
   13,123.82x = 19,689.06 × 4,358.78
4. Step 4: Simplify right side
   13,123.82x = 85,820,280.95
5. Step 5: Solve for x
   x = 85,820,280.95/13,123.82
6. Step 6: Final answer
   x = 6,539.28