Finding the Fourth Proportional to 112,835.20, 169,317.60 and 42,764.80

Step by Step Solution

1. Step 1: Write the proportion equation
   112,835.20 : 169,317.60 = 42,764.80 : x
2. Step 2: Convert to fraction form
   112,835.20/169,317.60 = 42,764.80/x
3. Step 3: Cross multiply
   112,835.20x = 169,317.60 × 42,764.80
4. Step 4: Simplify right side
   112,835.20x = 7,240,833,300.48
5. Step 5: Solve for x
   x = 7,240,833,300.48/112,835.20
6. Step 6: Final answer
   x = 64,171.76