Finding the Fourth Proportional to 72,870.71, 100,568.75 and 42,654.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,870.71 : 100,568.75 = 42,654.20 : x
2. Step 2: Convert to fraction form
   72,870.71/100,568.75 = 42,654.20/x
3. Step 3: Cross multiply
   72,870.71x = 100,568.75 × 42,654.20
4. Step 4: Simplify right side
   72,870.71x = 4,289,678,860.14
5. Step 5: Solve for x
   x = 4,289,678,860.14/72,870.71
6. Step 6: Final answer
   x = 58,866.99