Finding the Fourth Proportional to 42,777, 64,192.23 and 20,592.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,777 : 64,192.23 = 20,592.72 : x
2. Step 2: Convert to fraction form
   42,777/64,192.23 = 20,592.72/x
3. Step 3: Cross multiply
   42,777x = 64,192.23 × 20,592.72
4. Step 4: Simplify right side
   42,777x = 1,321,892,618.57
5. Step 5: Solve for x
   x = 1,321,892,618.57/42,777
6. Step 6: Final answer
   x = 30,901.95