Finding the Fourth Proportional to 115,197.50, 158,980.71 and 64,896.50

Step by Step Solution

1. Step 1: Write the proportion equation
   115,197.50 : 158,980.71 = 64,896.50 : x
2. Step 2: Convert to fraction form
   115,197.50/158,980.71 = 64,896.50/x
3. Step 3: Cross multiply
   115,197.50x = 158,980.71 × 64,896.50
4. Step 4: Simplify right side
   115,197.50x = 10,317,291,646.52
5. Step 5: Solve for x
   x = 10,317,291,646.52/115,197.50
6. Step 6: Final answer
   x = 89,561.77