Finding the Fourth Proportional to 82,642.80, 123,981.60 and 43,189.32

Step by Step Solution

1. Step 1: Write the proportion equation
   82,642.80 : 123,981.60 = 43,189.32 : x
2. Step 2: Convert to fraction form
   82,642.80/123,981.60 = 43,189.32/x
3. Step 3: Cross multiply
   82,642.80x = 123,981.60 × 43,189.32
4. Step 4: Simplify right side
   82,642.80x = 5,354,680,996.51
5. Step 5: Solve for x
   x = 5,354,680,996.51/82,642.80
6. Step 6: Final answer
   x = 64,793.07