Finding the Fourth Proportional to 42,977,939.72, 64,466,929.55 and 13,831,774.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,977,939.72 : 64,466,929.55 = 13,831,774.62 : x
2. Step 2: Convert to fraction form
   42,977,939.72/64,466,929.55 = 13,831,774.62/x
3. Step 3: Cross multiply
   42,977,939.72x = 64,466,929.55 × 13,831,774.62
4. Step 4: Simplify right side
   42,977,939.72x = 891,692,039,979,017.88
5. Step 5: Solve for x
   x = 891,692,039,979,017.88/42,977,939.72
6. Step 6: Final answer
   x = 20,747,668.36