Finding the Fourth Proportional to 166,894.72, 230,314.96 and 91,443.20

Step by Step Solution

1. Step 1: Write the proportion equation
   166,894.72 : 230,314.96 = 91,443.20 : x
2. Step 2: Convert to fraction form
   166,894.72/230,314.96 = 91,443.20/x
3. Step 3: Cross multiply
   166,894.72x = 230,314.96 × 91,443.20
4. Step 4: Simplify right side
   166,894.72x = 21,060,736,950.27
5. Step 5: Solve for x
   x = 21,060,736,950.27/166,894.72
6. Step 6: Final answer
   x = 126,191.75