Finding the Fourth Proportional to 65,781, 98,716.86 and 57,007.08

Step by Step Solution

1. Step 1: Write the proportion equation
   65,781 : 98,716.86 = 57,007.08 : x
2. Step 2: Convert to fraction form
   65,781/98,716.86 = 57,007.08/x
3. Step 3: Cross multiply
   65,781x = 98,716.86 × 57,007.08
4. Step 4: Simplify right side
   65,781x = 5,627,559,935.37
5. Step 5: Solve for x
   x = 5,627,559,935.37/65,781
6. Step 6: Final answer
   x = 85,549.93