Finding the Fourth Proportional to 65,783, 98,719.86 and 57,009.08

Step by Step Solution

1. Step 1: Write the proportion equation
   65,783 : 98,719.86 = 57,009.08 : x
2. Step 2: Convert to fraction form
   65,783/98,719.86 = 57,009.08/x
3. Step 3: Cross multiply
   65,783x = 98,719.86 × 57,009.08
4. Step 4: Simplify right side
   65,783x = 5,627,928,396.33
5. Step 5: Solve for x
   x = 5,627,928,396.33/65,783
6. Step 6: Final answer
   x = 85,552.93