Finding the Fourth Proportional to 19,667.89, 27,141.60 and 10,715.36

Step by Step Solution

1. Step 1: Write the proportion equation
   19,667.89 : 27,141.60 = 10,715.36 : x
2. Step 2: Convert to fraction form
   19,667.89/27,141.60 = 10,715.36/x
3. Step 3: Cross multiply
   19,667.89x = 27,141.60 × 10,715.36
4. Step 4: Simplify right side
   19,667.89x = 290,832,082.83
5. Step 5: Solve for x
   x = 290,832,082.83/19,667.89
6. Step 6: Final answer
   x = 14,787.15