Finding the Fourth Proportional to 7,156.52, 9,876.01 and 3,970.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,156.52 : 9,876.01 = 3,970.31 : x
2. Step 2: Convert to fraction form
   7,156.52/9,876.01 = 3,970.31/x
3. Step 3: Cross multiply
   7,156.52x = 9,876.01 × 3,970.31
4. Step 4: Simplify right side
   7,156.52x = 39,210,836.03
5. Step 5: Solve for x
   x = 39,210,836.03/7,156.52
6. Step 6: Final answer
   x = 5,479.03