Finding the Fourth Proportional to 148,196.75, 204,516.65 and 81,128.75

Step by Step Solution

1. Step 1: Write the proportion equation
   148,196.75 : 204,516.65 = 81,128.75 : x
2. Step 2: Convert to fraction form
   148,196.75/204,516.65 = 81,128.75/x
3. Step 3: Cross multiply
   148,196.75x = 204,516.65 × 81,128.75
4. Step 4: Simplify right side
   148,196.75x = 16,592,179,763.04
5. Step 5: Solve for x
   x = 16,592,179,763.04/148,196.75
6. Step 6: Final answer
   x = 111,960.48