Finding the Fourth Proportional to 78,698.96, 108,601.40 and 42,888.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,698.96 : 108,601.40 = 42,888.20 : x
2. Step 2: Convert to fraction form
   78,698.96/108,601.40 = 42,888.20/x
3. Step 3: Cross multiply
   78,698.96x = 108,601.40 × 42,888.20
4. Step 4: Simplify right side
   78,698.96x = 4,657,718,942.20
5. Step 5: Solve for x
   x = 4,657,718,942.20/78,698.96
6. Step 6: Final answer
   x = 59,184.00