Finding the Fourth Proportional to 7,152.31, 9,870.77 and 3,965.93

Step by Step Solution

1. Step 1: Write the proportion equation
   7,152.31 : 9,870.77 = 3,965.93 : x
2. Step 2: Convert to fraction form
   7,152.31/9,870.77 = 3,965.93/x
3. Step 3: Cross multiply
   7,152.31x = 9,870.77 × 3,965.93
4. Step 4: Simplify right side
   7,152.31x = 39,146,743.43
5. Step 5: Solve for x
   x = 39,146,743.43/7,152.31
6. Step 6: Final answer
   x = 5,473.30