Finding the Fourth Proportional to 112,856.50, 169,235.53 and 42,686.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,856.50 : 169,235.53 = 42,686.60 : x
2. Step 2: Convert to fraction form
   112,856.50/169,235.53 = 42,686.60/x
3. Step 3: Cross multiply
   112,856.50x = 169,235.53 × 42,686.60
4. Step 4: Simplify right side
   112,856.50x = 7,224,089,691.27
5. Step 5: Solve for x
   x = 7,224,089,691.27/112,856.50
6. Step 6: Final answer
   x = 64,011.29