Finding the Fourth Proportional to 120,111.80, 165,752.46 and 72,391.46

Step by Step Solution

1. Step 1: Write the proportion equation
   120,111.80 : 165,752.46 = 72,391.46 : x
2. Step 2: Convert to fraction form
   120,111.80/165,752.46 = 72,391.46/x
3. Step 3: Cross multiply
   120,111.80x = 165,752.46 × 72,391.46
4. Step 4: Simplify right side
   120,111.80x = 11,999,061,749.23
5. Step 5: Solve for x
   x = 11,999,061,749.23/120,111.80
6. Step 6: Final answer
   x = 99,899.11