Finding the Fourth Proportional to 82,366.80, 123,521.40 and 42,910.80

Step by Step Solution

1. Step 1: Write the proportion equation
   82,366.80 : 123,521.40 = 42,910.80 : x
2. Step 2: Convert to fraction form
   82,366.80/123,521.40 = 42,910.80/x
3. Step 3: Cross multiply
   82,366.80x = 123,521.40 × 42,910.80
4. Step 4: Simplify right side
   82,366.80x = 5,300,402,091.12
5. Step 5: Solve for x
   x = 5,300,402,091.12/82,366.80
6. Step 6: Final answer
   x = 64,351.20