Finding the Fourth Proportional to 123,225.42, 170,051.15 and 66,636.79

Step by Step Solution

1. Step 1: Write the proportion equation
   123,225.42 : 170,051.15 = 66,636.79 : x
2. Step 2: Convert to fraction form
   123,225.42/170,051.15 = 66,636.79/x
3. Step 3: Cross multiply
   123,225.42x = 170,051.15 × 66,636.79
4. Step 4: Simplify right side
   123,225.42x = 11,331,662,771.81
5. Step 5: Solve for x
   x = 11,331,662,771.81/123,225.42
6. Step 6: Final answer
   x = 91,958.81