Finding the Fourth Proportional to 83,421.18, 115,065 and 51,605.82

Step by Step Solution

1. Step 1: Write the proportion equation
   83,421.18 : 115,065 = 51,605.82 : x
2. Step 2: Convert to fraction form
   83,421.18/115,065 = 51,605.82/x
3. Step 3: Cross multiply
   83,421.18x = 115,065 × 51,605.82
4. Step 4: Simplify right side
   83,421.18x = 5,938,023,678.30
5. Step 5: Solve for x
   x = 5,938,023,678.30/83,421.18
6. Step 6: Final answer
   x = 71,181.25