Finding the Fourth Proportional to 65,815.83, 98,723.79 and 30,780.09

Step by Step Solution

1. Step 1: Write the proportion equation
   65,815.83 : 98,723.79 = 30,780.09 : x
2. Step 2: Convert to fraction form
   65,815.83/98,723.79 = 30,780.09/x
3. Step 3: Cross multiply
   65,815.83x = 98,723.79 × 30,780.09
4. Step 4: Simplify right side
   65,815.83x = 3,038,727,141.34
5. Step 5: Solve for x
   x = 3,038,727,141.34/65,815.83
6. Step 6: Final answer
   x = 46,170.16