Finding the Fourth Proportional to 42,723,009.30, 64,086,263.55 and 12,430,872.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,723,009.30 : 64,086,263.55 = 12,430,872.30 : x
2. Step 2: Convert to fraction form
   42,723,009.30/64,086,263.55 = 12,430,872.30/x
3. Step 3: Cross multiply
   42,723,009.30x = 64,086,263.55 × 12,430,872.30
4. Step 4: Simplify right side
   42,723,009.30x = 796,648,158,374,194.62
5. Step 5: Solve for x
   x = 796,648,158,374,194.62/42,723,009.30
6. Step 6: Final answer
   x = 18,646,817.52