Finding the Fourth Proportional to 166,123.42, 229,252.71 and 90,670.30

Step by Step Solution

1. Step 1: Write the proportion equation
   166,123.42 : 229,252.71 = 90,670.30 : x
2. Step 2: Convert to fraction form
   166,123.42/229,252.71 = 90,670.30/x
3. Step 3: Cross multiply
   166,123.42x = 229,252.71 × 90,670.30
4. Step 4: Simplify right side
   166,123.42x = 20,786,411,991.51
5. Step 5: Solve for x
   x = 20,786,411,991.51/166,123.42
6. Step 6: Final answer
   x = 125,126.32