Finding the Fourth Proportional to 80,437.56, 120,548.86 and 42,409.27

Step by Step Solution

1. Step 1: Write the proportion equation
   80,437.56 : 120,548.86 = 42,409.27 : x
2. Step 2: Convert to fraction form
   80,437.56/120,548.86 = 42,409.27/x
3. Step 3: Cross multiply
   80,437.56x = 120,548.86 × 42,409.27
4. Step 4: Simplify right side
   80,437.56x = 5,112,389,196.60
5. Step 5: Solve for x
   x = 5,112,389,196.60/80,437.56
6. Step 6: Final answer
   x = 63,557.24