Finding the Fourth Proportional to 259,881.71, 389,855.37 and 91,362.43

Step by Step Solution

1. Step 1: Write the proportion equation
   259,881.71 : 389,855.37 = 91,362.43 : x
2. Step 2: Convert to fraction form
   259,881.71/389,855.37 = 91,362.43/x
3. Step 3: Cross multiply
   259,881.71x = 389,855.37 × 91,362.43
4. Step 4: Simplify right side
   259,881.71x = 35,618,132,002.47
5. Step 5: Solve for x
   x = 35,618,132,002.47/259,881.71
6. Step 6: Final answer
   x = 137,055.17