Finding the Fourth Proportional to 171,128.23, 236,062.16 and 99,500.33

Step by Step Solution

1. Step 1: Write the proportion equation
   171,128.23 : 236,062.16 = 99,500.33 : x
2. Step 2: Convert to fraction form
   171,128.23/236,062.16 = 99,500.33/x
3. Step 3: Cross multiply
   171,128.23x = 236,062.16 × 99,500.33
4. Step 4: Simplify right side
   171,128.23x = 23,488,262,323.01
5. Step 5: Solve for x
   x = 23,488,262,323.01/171,128.23
6. Step 6: Final answer
   x = 137,255.33