Finding the Fourth Proportional to 56,112.48, 84,011.58 and 42,271.20

Step by Step Solution

1. Step 1: Write the proportion equation
   56,112.48 : 84,011.58 = 42,271.20 : x
2. Step 2: Convert to fraction form
   56,112.48/84,011.58 = 42,271.20/x
3. Step 3: Cross multiply
   56,112.48x = 84,011.58 × 42,271.20
4. Step 4: Simplify right side
   56,112.48x = 3,551,270,300.50
5. Step 5: Solve for x
   x = 3,551,270,300.50/56,112.48
6. Step 6: Final answer
   x = 63,288.42