Finding the Fourth Proportional to 7,359.31, 10,155.81 and 4,172.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,359.31 : 10,155.81 = 4,172.50 : x
2. Step 2: Convert to fraction form
   7,359.31/10,155.81 = 4,172.50/x
3. Step 3: Cross multiply
   7,359.31x = 10,155.81 × 4,172.50
4. Step 4: Simplify right side
   7,359.31x = 42,375,117.23
5. Step 5: Solve for x
   x = 42,375,117.23/7,359.31
6. Step 6: Final answer
   x = 5,758.03