Finding the Fourth Proportional to 42,774.75, 64,188.05 and 18,150.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,774.75 : 64,188.05 = 18,150.75 : x
2. Step 2: Convert to fraction form
   42,774.75/64,188.05 = 18,150.75/x
3. Step 3: Cross multiply
   42,774.75x = 64,188.05 × 18,150.75
4. Step 4: Simplify right side
   42,774.75x = 1,165,061,157.78
5. Step 5: Solve for x
   x = 1,165,061,157.78/42,774.75
6. Step 6: Final answer
   x = 27,237.12