Finding the Fourth Proportional to 108,978.28, 163,435.66 and 42,402.56

Step by Step Solution

1. Step 1: Write the proportion equation
   108,978.28 : 163,435.66 = 42,402.56 : x
2. Step 2: Convert to fraction form
   108,978.28/163,435.66 = 42,402.56/x
3. Step 3: Cross multiply
   108,978.28x = 163,435.66 × 42,402.56
4. Step 4: Simplify right side
   108,978.28x = 6,930,089,456.10
5. Step 5: Solve for x
   x = 6,930,089,456.10/108,978.28
6. Step 6: Final answer
   x = 63,591.48