Finding the Fourth Proportional to 42,857,141.94, 64,287,046.12 and 20,392,056.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,857,141.94 : 64,287,046.12 = 20,392,056.50 : x
2. Step 2: Convert to fraction form
   42,857,141.94/64,287,046.12 = 20,392,056.50/x
3. Step 3: Cross multiply
   42,857,141.94x = 64,287,046.12 × 20,392,056.50
4. Step 4: Simplify right side
   42,857,141.94x = 1,310,945,076,697,145.75
5. Step 5: Solve for x
   x = 1,310,945,076,697,145.75/42,857,141.94
6. Step 6: Final answer
   x = 30,588,719.11