Finding the Fourth Proportional to 7,128.19, 10,688.64 and 3,798.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.19 : 10,688.64 = 3,798.34 : x
2. Step 2: Convert to fraction form
   7,128.19/10,688.64 = 3,798.34/x
3. Step 3: Cross multiply
   7,128.19x = 10,688.64 × 3,798.34
4. Step 4: Simplify right side
   7,128.19x = 40,599,047.89
5. Step 5: Solve for x
   x = 40,599,047.89/7,128.19
6. Step 6: Final answer
   x = 5,695.56