Finding the Fourth Proportional to 82,458.21, 123,618.06 and 57,424.35

Step by Step Solution

1. Step 1: Write the proportion equation
   82,458.21 : 123,618.06 = 57,424.35 : x
2. Step 2: Convert to fraction form
   82,458.21/123,618.06 = 57,424.35/x
3. Step 3: Cross multiply
   82,458.21x = 123,618.06 × 57,424.35
4. Step 4: Simplify right side
   82,458.21x = 7,098,686,743.76
5. Step 5: Solve for x
   x = 7,098,686,743.76/82,458.21
6. Step 6: Final answer
   x = 86,088.30