Finding the Fourth Proportional to 148,196.25, 204,510.84 and 81,128.25

Step by Step Solution

1. Step 1: Write the proportion equation
   148,196.25 : 204,510.84 = 81,128.25 : x
2. Step 2: Convert to fraction form
   148,196.25/204,510.84 = 81,128.25/x
3. Step 3: Cross multiply
   148,196.25x = 204,510.84 × 81,128.25
4. Step 4: Simplify right side
   148,196.25x = 16,591,606,555.23
5. Step 5: Solve for x
   x = 16,591,606,555.23/148,196.25
6. Step 6: Final answer
   x = 111,956.99