Finding the Fourth Proportional to 147,748.56, 221,063.88 and 90,618.48

Step by Step Solution

1. Step 1: Write the proportion equation
   147,748.56 : 221,063.88 = 90,618.48 : x
2. Step 2: Convert to fraction form
   147,748.56/221,063.88 = 90,618.48/x
3. Step 3: Cross multiply
   147,748.56x = 221,063.88 × 90,618.48
4. Step 4: Simplify right side
   147,748.56x = 20,032,472,788.50
5. Step 5: Solve for x
   x = 20,032,472,788.50/147,748.56
6. Step 6: Final answer
   x = 135,584.89