Finding the Fourth Proportional to 259,411.02, 389,128.45 and 79,483.56

Step by Step Solution

1. Step 1: Write the proportion equation
   259,411.02 : 389,128.45 = 79,483.56 : x
2. Step 2: Convert to fraction form
   259,411.02/389,128.45 = 79,483.56/x
3. Step 3: Cross multiply
   259,411.02x = 389,128.45 × 79,483.56
4. Step 4: Simplify right side
   259,411.02x = 30,929,314,503.28
5. Step 5: Solve for x
   x = 30,929,314,503.28/259,411.02
6. Step 6: Final answer
   x = 119,228.99