Finding the Fourth Proportional to 121,059.48, 166,993.83 and 72,649.02

Step by Step Solution

1. Step 1: Write the proportion equation
   121,059.48 : 166,993.83 = 72,649.02 : x
2. Step 2: Convert to fraction form
   121,059.48/166,993.83 = 72,649.02/x
3. Step 3: Cross multiply
   121,059.48x = 166,993.83 × 72,649.02
4. Step 4: Simplify right side
   121,059.48x = 12,131,938,095.55
5. Step 5: Solve for x
   x = 12,131,938,095.55/121,059.48
6. Step 6: Final answer
   x = 100,214.69