Finding the Fourth Proportional to 7,019.32, 9,686.28 and 3,875.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,019.32 : 9,686.28 = 3,875.28 : x
2. Step 2: Convert to fraction form
   7,019.32/9,686.28 = 3,875.28/x
3. Step 3: Cross multiply
   7,019.32x = 9,686.28 × 3,875.28
4. Step 4: Simplify right side
   7,019.32x = 37,537,047.16
5. Step 5: Solve for x
   x = 37,537,047.16/7,019.32
6. Step 6: Final answer
   x = 5,347.68