Finding the Fourth Proportional to 72,812.16, 109,261.98 and 30,689.64

Step by Step Solution

1. Step 1: Write the proportion equation
   72,812.16 : 109,261.98 = 30,689.64 : x
2. Step 2: Convert to fraction form
   72,812.16/109,261.98 = 30,689.64/x
3. Step 3: Cross multiply
   72,812.16x = 109,261.98 × 30,689.64
4. Step 4: Simplify right side
   72,812.16x = 3,353,210,831.89
5. Step 5: Solve for x
   x = 3,353,210,831.89/72,812.16
6. Step 6: Final answer
   x = 46,052.90