Finding the Fourth Proportional to 112,723.72, 155,488.35 and 72,489.94

Step by Step Solution

1. Step 1: Write the proportion equation
   112,723.72 : 155,488.35 = 72,489.94 : x
2. Step 2: Convert to fraction form
   112,723.72/155,488.35 = 72,489.94/x
3. Step 3: Cross multiply
   112,723.72x = 155,488.35 × 72,489.94
4. Step 4: Simplify right side
   112,723.72x = 11,271,341,162.20
5. Step 5: Solve for x
   x = 11,271,341,162.20/112,723.72
6. Step 6: Final answer
   x = 99,990.86