Finding the Fourth Proportional to 259,095.59, 388,606.48 and 81,597.99

Step by Step Solution

1. Step 1: Write the proportion equation
   259,095.59 : 388,606.48 = 81,597.99 : x
2. Step 2: Convert to fraction form
   259,095.59/388,606.48 = 81,597.99/x
3. Step 3: Cross multiply
   259,095.59x = 388,606.48 × 81,597.99
4. Step 4: Simplify right side
   259,095.59x = 31,709,507,195.33
5. Step 5: Solve for x
   x = 31,709,507,195.33/259,095.59
6. Step 6: Final answer
   x = 122,385.36