Finding the Fourth Proportional to 120,741.18, 166,678.56 and 72,366.18

Step by Step Solution

1. Step 1: Write the proportion equation
   120,741.18 : 166,678.56 = 72,366.18 : x
2. Step 2: Convert to fraction form
   120,741.18/166,678.56 = 72,366.18/x
3. Step 3: Cross multiply
   120,741.18x = 166,678.56 × 72,366.18
4. Step 4: Simplify right side
   120,741.18x = 12,061,890,675.10
5. Step 5: Solve for x
   x = 12,061,890,675.10/120,741.18
6. Step 6: Final answer
   x = 99,898.73