Finding the Fourth Proportional to 166,257, 229,435.88 and 90,805.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,257 : 229,435.88 = 90,805.50 : x
2. Step 2: Convert to fraction form
   166,257/229,435.88 = 90,805.50/x
3. Step 3: Cross multiply
   166,257x = 229,435.88 × 90,805.50
4. Step 4: Simplify right side
   166,257x = 20,834,039,347.31
5. Step 5: Solve for x
   x = 20,834,039,347.31/166,257
6. Step 6: Final answer
   x = 125,312.25