Finding the Fourth Proportional to 120,969.30, 166,946.98 and 72,573.05

Step by Step Solution

1. Step 1: Write the proportion equation
   120,969.30 : 166,946.98 = 72,573.05 : x
2. Step 2: Convert to fraction form
   120,969.30/166,946.98 = 72,573.05/x
3. Step 3: Cross multiply
   120,969.30x = 166,946.98 × 72,573.05
4. Step 4: Simplify right side
   120,969.30x = 12,115,850,959.82
5. Step 5: Solve for x
   x = 12,115,850,959.82/120,969.30
6. Step 6: Final answer
   x = 100,156.41