Finding the Fourth Proportional to 88,196.40, 131,970.60 and 64,868.40

Step by Step Solution

1. Step 1: Write the proportion equation
   88,196.40 : 131,970.60 = 64,868.40 : x
2. Step 2: Convert to fraction form
   88,196.40/131,970.60 = 64,868.40/x
3. Step 3: Cross multiply
   88,196.40x = 131,970.60 × 64,868.40
4. Step 4: Simplify right side
   88,196.40x = 8,560,721,669.04
5. Step 5: Solve for x
   x = 8,560,721,669.04/88,196.40
6. Step 6: Final answer
   x = 97,064.30