Finding the Fourth Proportional to 147,570.84, 221,365.98 and 42,390.72

Step by Step Solution

1. Step 1: Write the proportion equation
   147,570.84 : 221,365.98 = 42,390.72 : x
2. Step 2: Convert to fraction form
   147,570.84/221,365.98 = 42,390.72/x
3. Step 3: Cross multiply
   147,570.84x = 221,365.98 × 42,390.72
4. Step 4: Simplify right side
   147,570.84x = 9,383,863,275.71
5. Step 5: Solve for x
   x = 9,383,863,275.71/147,570.84
6. Step 6: Final answer
   x = 63,588.87