Finding the Fourth Proportional to 99,145.31, 148,725.77 and 28,066.80

Step by Step Solution

1. Step 1: Write the proportion equation
   99,145.31 : 148,725.77 = 28,066.80 : x
2. Step 2: Convert to fraction form
   99,145.31/148,725.77 = 28,066.80/x
3. Step 3: Cross multiply
   99,145.31x = 148,725.77 × 28,066.80
4. Step 4: Simplify right side
   99,145.31x = 4,174,256,301.10
5. Step 5: Solve for x
   x = 4,174,256,301.10/99,145.31
6. Step 6: Final answer
   x = 42,102.41