Finding the Fourth Proportional to 128,308.03, 192,572.81 and 113,361.10

Step by Step Solution

1. Step 1: Write the proportion equation
   128,308.03 : 192,572.81 = 113,361.10 : x
2. Step 2: Convert to fraction form
   128,308.03/192,572.81 = 113,361.10/x
3. Step 3: Cross multiply
   128,308.03x = 192,572.81 × 113,361.10
4. Step 4: Simplify right side
   128,308.03x = 21,830,265,571.69
5. Step 5: Solve for x
   x = 21,830,265,571.69/128,308.03
6. Step 6: Final answer
   x = 170,139.51