Finding the Fourth Proportional to 72,724,889.92, 109,105,608 and 20,909,588.80

Step by Step Solution

1. Step 1: Write the proportion equation
   72,724,889.92 : 109,105,608 = 20,909,588.80 : x
2. Step 2: Convert to fraction form
   72,724,889.92/109,105,608 = 20,909,588.80/x
3. Step 3: Cross multiply
   72,724,889.92x = 109,105,608 × 20,909,588.80
4. Step 4: Simplify right side
   72,724,889.92x = 2,281,353,399,053,990.50
5. Step 5: Solve for x
   x = 2,281,353,399,053,990.50/72,724,889.92
6. Step 6: Final answer
   x = 31,369,637.02