Finding the Fourth Proportional to 82,364.80, 123,518.40 and 42,908.80

Step by Step Solution

1. Step 1: Write the proportion equation
   82,364.80 : 123,518.40 = 42,908.80 : x
2. Step 2: Convert to fraction form
   82,364.80/123,518.40 = 42,908.80/x
3. Step 3: Cross multiply
   82,364.80x = 123,518.40 × 42,908.80
4. Step 4: Simplify right side
   82,364.80x = 5,300,026,321.92
5. Step 5: Solve for x
   x = 5,300,026,321.92/82,364.80
6. Step 6: Final answer
   x = 64,348.20