Finding the Fourth Proportional to 188,171.03, 259,667.17 and 102,128.07

Step by Step Solution

1. Step 1: Write the proportion equation
   188,171.03 : 259,667.17 = 102,128.07 : x
2. Step 2: Convert to fraction form
   188,171.03/259,667.17 = 102,128.07/x
3. Step 3: Cross multiply
   188,171.03x = 259,667.17 × 102,128.07
4. Step 4: Simplify right side
   188,171.03x = 26,519,307,632.89
5. Step 5: Solve for x
   x = 26,519,307,632.89/188,171.03
6. Step 6: Final answer
   x = 140,931.93