Finding the Fourth Proportional to 82,238.80, 123,329.40 and 42,782.80

Step by Step Solution

1. Step 1: Write the proportion equation
   82,238.80 : 123,329.40 = 42,782.80 : x
2. Step 2: Convert to fraction form
   82,238.80/123,329.40 = 42,782.80/x
3. Step 3: Cross multiply
   82,238.80x = 123,329.40 × 42,782.80
4. Step 4: Simplify right side
   82,238.80x = 5,276,377,054.32
5. Step 5: Solve for x
   x = 5,276,377,054.32/82,238.80
6. Step 6: Final answer
   x = 64,159.22