Finding the Fourth Proportional to 65,907.72, 98,819.68 and 55,915.91

Step by Step Solution

1. Step 1: Write the proportion equation
   65,907.72 : 98,819.68 = 55,915.91 : x
2. Step 2: Convert to fraction form
   65,907.72/98,819.68 = 55,915.91/x
3. Step 3: Cross multiply
   65,907.72x = 98,819.68 × 55,915.91
4. Step 4: Simplify right side
   65,907.72x = 5,525,592,069.79
5. Step 5: Solve for x
   x = 5,525,592,069.79/65,907.72
6. Step 6: Final answer
   x = 83,838.31