Finding the Fourth Proportional to 259,675.86, 389,556.86 and 91,152.48

Step by Step Solution

1. Step 1: Write the proportion equation
   259,675.86 : 389,556.86 = 91,152.48 : x
2. Step 2: Convert to fraction form
   259,675.86/389,556.86 = 91,152.48/x
3. Step 3: Cross multiply
   259,675.86x = 389,556.86 × 91,152.48
4. Step 4: Simplify right side
   259,675.86x = 35,509,073,434.25
5. Step 5: Solve for x
   x = 35,509,073,434.25/259,675.86
6. Step 6: Final answer
   x = 136,743.84