Finding the Fourth Proportional to 75,870.84, 104,712.30 and 42,339

Step by Step Solution

1. Step 1: Write the proportion equation
   75,870.84 : 104,712.30 = 42,339 : x
2. Step 2: Convert to fraction form
   75,870.84/104,712.30 = 42,339/x
3. Step 3: Cross multiply
   75,870.84x = 104,712.30 × 42,339
4. Step 4: Simplify right side
   75,870.84x = 4,433,414,069.70
5. Step 5: Solve for x
   x = 4,433,414,069.70/75,870.84
6. Step 6: Final answer
   x = 58,433.70