Finding the Fourth Proportional to 82,440, 123,654.24 and 43,019.28

Step by Step Solution

1. Step 1: Write the proportion equation
   82,440 : 123,654.24 = 43,019.28 : x
2. Step 2: Convert to fraction form
   82,440/123,654.24 = 43,019.28/x
3. Step 3: Cross multiply
   82,440x = 123,654.24 × 43,019.28
4. Step 4: Simplify right side
   82,440x = 5,319,516,373.75
5. Step 5: Solve for x
   x = 5,319,516,373.75/82,440
6. Step 6: Final answer
   x = 64,525.91