Finding the Fourth Proportional to 112,858.50, 169,238.53 and 42,688.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,858.50 : 169,238.53 = 42,688.60 : x
2. Step 2: Convert to fraction form
   112,858.50/169,238.53 = 42,688.60/x
3. Step 3: Cross multiply
   112,858.50x = 169,238.53 × 42,688.60
4. Step 4: Simplify right side
   112,858.50x = 7,224,555,911.76
5. Step 5: Solve for x
   x = 7,224,555,911.76/112,858.50
6. Step 6: Final answer
   x = 64,014.28