Finding the Fourth Proportional to 10,091.94, 15,138.18 and 3,428.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,091.94 : 15,138.18 = 3,428.34 : x
2. Step 2: Convert to fraction form
   10,091.94/15,138.18 = 3,428.34/x
3. Step 3: Cross multiply
   10,091.94x = 15,138.18 × 3,428.34
4. Step 4: Simplify right side
   10,091.94x = 51,898,828.02
5. Step 5: Solve for x
   x = 51,898,828.02/10,091.94
6. Step 6: Final answer
   x = 5,142.60