Finding the Fourth Proportional to 12,938.34, 19,410.38 and 7,091.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,938.34 : 19,410.38 = 7,091.94 : x
2. Step 2: Convert to fraction form
   12,938.34/19,410.38 = 7,091.94/x
3. Step 3: Cross multiply
   12,938.34x = 19,410.38 × 7,091.94
4. Step 4: Simplify right side
   12,938.34x = 137,657,250.34
5. Step 5: Solve for x
   x = 137,657,250.34/12,938.34
6. Step 6: Final answer
   x = 10,639.48