Finding the Fourth Proportional to 13,123.49, 19,678.73 and 4,355.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123.49 : 19,678.73 = 4,355.46 : x
2. Step 2: Convert to fraction form
   13,123.49/19,678.73 = 4,355.46/x
3. Step 3: Cross multiply
   13,123.49x = 19,678.73 × 4,355.46
4. Step 4: Simplify right side
   13,123.49x = 85,709,899.59
5. Step 5: Solve for x
   x = 85,709,899.59/13,123.49
6. Step 6: Final answer
   x = 6,531.03