Finding the Fourth Proportional to 82,281.10, 123,425.70 and 42,915.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82,281.10 : 123,425.70 = 42,915.10 : x
2. Step 2: Convert to fraction form
   82,281.10/123,425.70 = 42,915.10/x
3. Step 3: Cross multiply
   82,281.10x = 123,425.70 × 42,915.10
4. Step 4: Simplify right side
   82,281.10x = 5,296,826,258.07
5. Step 5: Solve for x
   x = 5,296,826,258.07/82,281.10
6. Step 6: Final answer
   x = 64,374.76