Finding the Fourth Proportional to 70,721.46, 105,985.59 and 39,084.69

Step by Step Solution

1. Step 1: Write the proportion equation
   70,721.46 : 105,985.59 = 39,084.69 : x
2. Step 2: Convert to fraction form
   70,721.46/105,985.59 = 39,084.69/x
3. Step 3: Cross multiply
   70,721.46x = 105,985.59 × 39,084.69
4. Step 4: Simplify right side
   70,721.46x = 4,142,413,929.62
5. Step 5: Solve for x
   x = 4,142,413,929.62/70,721.46
6. Step 6: Final answer
   x = 58,573.65