Finding the Fourth Proportional to 115,196.55, 158,970.87 and 64,208.70

Step by Step Solution

1. Step 1: Write the proportion equation
   115,196.55 : 158,970.87 = 64,208.70 : x
2. Step 2: Convert to fraction form
   115,196.55/158,970.87 = 64,208.70/x
3. Step 3: Cross multiply
   115,196.55x = 158,970.87 × 64,208.70
4. Step 4: Simplify right side
   115,196.55x = 10,207,312,900.57
5. Step 5: Solve for x
   x = 10,207,312,900.57/115,196.55
6. Step 6: Final answer
   x = 88,607.80