Finding the Fourth Proportional to 42,311,748.72, 63,466,456.68 and 28,446,985.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,311,748.72 : 63,466,456.68 = 28,446,985.20 : x
2. Step 2: Convert to fraction form
   42,311,748.72/63,466,456.68 = 28,446,985.20/x
3. Step 3: Cross multiply
   42,311,748.72x = 63,466,456.68 × 28,446,985.20
4. Step 4: Simplify right side
   42,311,748.72x = 1,805,429,353,872,401
5. Step 5: Solve for x
   x = 1,805,429,353,872,401/42,311,748.72
6. Step 6: Final answer
   x = 42,669,693.61