Finding the Fourth Proportional to 147,870.25, 221,842.27 and 42,689.21

Step by Step Solution

1. Step 1: Write the proportion equation
   147,870.25 : 221,842.27 = 42,689.21 : x
2. Step 2: Convert to fraction form
   147,870.25/221,842.27 = 42,689.21/x
3. Step 3: Cross multiply
   147,870.25x = 221,842.27 × 42,689.21
4. Step 4: Simplify right side
   147,870.25x = 9,470,272,528.90
5. Step 5: Solve for x
   x = 9,470,272,528.90/147,870.25
6. Step 6: Final answer
   x = 64,044.48