Finding the Fourth Proportional to 82,415.71, 123,645.76 and 42,412.89

Step by Step Solution

1. Step 1: Write the proportion equation
   82,415.71 : 123,645.76 = 42,412.89 : x
2. Step 2: Convert to fraction form
   82,415.71/123,645.76 = 42,412.89/x
3. Step 3: Cross multiply
   82,415.71x = 123,645.76 × 42,412.89
4. Step 4: Simplify right side
   82,415.71x = 5,244,174,372.71
5. Step 5: Solve for x
   x = 5,244,174,372.71/82,415.71
6. Step 6: Final answer
   x = 63,630.76