Finding the Fourth Proportional to 99,738.16, 137,650.76 and 72,867.22

Step by Step Solution

1. Step 1: Write the proportion equation
   99,738.16 : 137,650.76 = 72,867.22 : x
2. Step 2: Convert to fraction form
   99,738.16/137,650.76 = 72,867.22/x
3. Step 3: Cross multiply
   99,738.16x = 137,650.76 × 72,867.22
4. Step 4: Simplify right side
   99,738.16x = 10,030,228,212.09
5. Step 5: Solve for x
   x = 10,030,228,212.09/99,738.16
6. Step 6: Final answer
   x = 100,565.60