Finding the Fourth Proportional to 82,386.80, 123,551.40 and 42,930.80

Step by Step Solution

1. Step 1: Write the proportion equation
   82,386.80 : 123,551.40 = 42,930.80 : x
2. Step 2: Convert to fraction form
   82,386.80/123,551.40 = 42,930.80/x
3. Step 3: Cross multiply
   82,386.80x = 123,551.40 × 42,930.80
4. Step 4: Simplify right side
   82,386.80x = 5,304,160,443.12
5. Step 5: Solve for x
   x = 5,304,160,443.12/82,386.80
6. Step 6: Final answer
   x = 64,381.19