Finding the Fourth Proportional to 13,072.15, 19,606.60 and 7,738.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,072.15 : 19,606.60 = 7,738.50 : x
2. Step 2: Convert to fraction form
   13,072.15/19,606.60 = 7,738.50/x
3. Step 3: Cross multiply
   13,072.15x = 19,606.60 × 7,738.50
4. Step 4: Simplify right side
   13,072.15x = 151,725,674.10
5. Step 5: Solve for x
   x = 151,725,674.10/13,072.15
6. Step 6: Final answer
   x = 11,606.79