Finding the Fourth Proportional to 65,980.38, 91,050.69 and 39,106.92

Step by Step Solution

1. Step 1: Write the proportion equation
   65,980.38 : 91,050.69 = 39,106.92 : x
2. Step 2: Convert to fraction form
   65,980.38/91,050.69 = 39,106.92/x
3. Step 3: Cross multiply
   65,980.38x = 91,050.69 × 39,106.92
4. Step 4: Simplify right side
   65,980.38x = 3,560,712,049.77
5. Step 5: Solve for x
   x = 3,560,712,049.77/65,980.38
6. Step 6: Final answer
   x = 53,966.23