Finding the Fourth Proportional to 42,788,267.36, 64,185,085.85 and 12,085,250.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,788,267.36 : 64,185,085.85 = 12,085,250.78 : x
2. Step 2: Convert to fraction form
   42,788,267.36/64,185,085.85 = 12,085,250.78/x
3. Step 3: Cross multiply
   42,788,267.36x = 64,185,085.85 × 12,085,250.78
4. Step 4: Simplify right side
   42,788,267.36x = 775,692,858,451,727.75
5. Step 5: Solve for x
   x = 775,692,858,451,727.75/42,788,267.36
6. Step 6: Final answer
   x = 18,128,634.47