Finding the Fourth Proportional to 82,638.48, 123,927.72 and 45,226.20

Step by Step Solution

1. Step 1: Write the proportion equation
   82,638.48 : 123,927.72 = 45,226.20 : x
2. Step 2: Convert to fraction form
   82,638.48/123,927.72 = 45,226.20/x
3. Step 3: Cross multiply
   82,638.48x = 123,927.72 × 45,226.20
4. Step 4: Simplify right side
   82,638.48x = 5,604,779,850.26
5. Step 5: Solve for x
   x = 5,604,779,850.26/82,638.48
6. Step 6: Final answer
   x = 67,822.88