Finding the Fourth Proportional to 42,788,259.86, 64,185,074.60 and 12,085,243.27

Step by Step Solution

1. Step 1: Write the proportion equation
   42,788,259.86 : 64,185,074.60 = 12,085,243.27 : x
2. Step 2: Convert to fraction form
   42,788,259.86/64,185,074.60 = 12,085,243.27/x
3. Step 3: Cross multiply
   42,788,259.86x = 64,185,074.60 × 12,085,243.27
4. Step 4: Simplify right side
   42,788,259.86x = 775,692,240,623,209
5. Step 5: Solve for x
   x = 775,692,240,623,209/42,788,259.86
6. Step 6: Final answer
   x = 18,128,623.21