Finding the Fourth Proportional to 128,503.10, 192,931.52 and 65,365.94

Step by Step Solution

1. Step 1: Write the proportion equation
   128,503.10 : 192,931.52 = 65,365.94 : x
2. Step 2: Convert to fraction form
   128,503.10/192,931.52 = 65,365.94/x
3. Step 3: Cross multiply
   128,503.10x = 192,931.52 × 65,365.94
4. Step 4: Simplify right side
   128,503.10x = 12,611,150,160.43
5. Step 5: Solve for x
   x = 12,611,150,160.43/128,503.10
6. Step 6: Final answer
   x = 98,138.88