Finding the Fourth Proportional to 115,216.28, 158,985.62 and 64,225.16

Step by Step Solution

1. Step 1: Write the proportion equation
   115,216.28 : 158,985.62 = 64,225.16 : x
2. Step 2: Convert to fraction form
   115,216.28/158,985.62 = 64,225.16/x
3. Step 3: Cross multiply
   115,216.28x = 158,985.62 × 64,225.16
4. Step 4: Simplify right side
   115,216.28x = 10,210,875,766.15
5. Step 5: Solve for x
   x = 10,210,875,766.15/115,216.28
6. Step 6: Final answer
   x = 88,623.55