Finding the Fourth Proportional to 78,696.81, 108,601.61 and 42,886.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,696.81 : 108,601.61 = 42,886.80 : x
2. Step 2: Convert to fraction form
   78,696.81/108,601.61 = 42,886.80/x
3. Step 3: Cross multiply
   78,696.81x = 108,601.61 × 42,886.80
4. Step 4: Simplify right side
   78,696.81x = 4,657,575,313.31
5. Step 5: Solve for x
   x = 4,657,575,313.31/78,696.81
6. Step 6: Final answer
   x = 59,183.79