Finding the Fourth Proportional to 82,511.10, 123,770.70 and 43,145.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,511.10 : 123,770.70 = 43,145.10 : x
2. Step 2: Convert to fraction form
   82,511.10/123,770.70 = 43,145.10/x
3. Step 3: Cross multiply
   82,511.10x = 123,770.70 × 43,145.10
4. Step 4: Simplify right side
   82,511.10x = 5,340,099,228.57
5. Step 5: Solve for x
   x = 5,340,099,228.57/82,511.10
6. Step 6: Final answer
   x = 64,719.77