Finding the Fourth Proportional to 265,911.58, 398,870.81 and 88,418.59

Step by Step Solution

1. Step 1: Write the proportion equation
   265,911.58 : 398,870.81 = 88,418.59 : x
2. Step 2: Convert to fraction form
   265,911.58/398,870.81 = 88,418.59/x
3. Step 3: Cross multiply
   265,911.58x = 398,870.81 × 88,418.59
4. Step 4: Simplify right side
   265,911.58x = 35,267,594,002.01
5. Step 5: Solve for x
   x = 35,267,594,002.01/265,911.58
6. Step 6: Final answer
   x = 132,629.03