Finding the Fourth Proportional to 72,285,819.86, 108,426,660.50 and 20,470,299.98

Step by Step Solution

1. Step 1: Write the proportion equation
   72,285,819.86 : 108,426,660.50 = 20,470,299.98 : x
2. Step 2: Convert to fraction form
   72,285,819.86/108,426,660.50 = 20,470,299.98/x
3. Step 3: Cross multiply
   72,285,819.86x = 108,426,660.50 × 20,470,299.98
4. Step 4: Simplify right side
   72,285,819.86x = 2,219,526,266,436,054.25
5. Step 5: Solve for x
   x = 2,219,526,266,436,054.25/72,285,819.86
6. Step 6: Final answer
   x = 30,704,863.98