Finding the Fourth Proportional to 147,870.80, 221,770.20 and 42,678.80

Step by Step Solution

1. Step 1: Write the proportion equation
   147,870.80 : 221,770.20 = 42,678.80 : x
2. Step 2: Convert to fraction form
   147,870.80/221,770.20 = 42,678.80/x
3. Step 3: Cross multiply
   147,870.80x = 221,770.20 × 42,678.80
4. Step 4: Simplify right side
   147,870.80x = 9,464,886,011.76
5. Step 5: Solve for x
   x = 9,464,886,011.76/147,870.80
6. Step 6: Final answer
   x = 64,007.81