Finding the Fourth Proportional to 166,644, 229,968.72 and 91,192.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,644 : 229,968.72 = 91,192.50 : x
2. Step 2: Convert to fraction form
   166,644/229,968.72 = 91,192.50/x
3. Step 3: Cross multiply
   166,644x = 229,968.72 × 91,192.50
4. Step 4: Simplify right side
   166,644x = 20,971,422,498.60
5. Step 5: Solve for x
   x = 20,971,422,498.60/166,644
6. Step 6: Final answer
   x = 125,845.65