Finding the Fourth Proportional to 112,859.50, 169,240.03 and 42,689.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,859.50 : 169,240.03 = 42,689.60 : x
2. Step 2: Convert to fraction form
   112,859.50/169,240.03 = 42,689.60/x
3. Step 3: Cross multiply
   112,859.50x = 169,240.03 × 42,689.60
4. Step 4: Simplify right side
   112,859.50x = 7,224,789,184.69
5. Step 5: Solve for x
   x = 7,224,789,184.69/112,859.50
6. Step 6: Final answer
   x = 64,015.78