Finding the Fourth Proportional to 147,410.72, 220,043.56 and 128,748.32

Step by Step Solution

1. Step 1: Write the proportion equation
   147,410.72 : 220,043.56 = 128,748.32 : x
2. Step 2: Convert to fraction form
   147,410.72/220,043.56 = 128,748.32/x
3. Step 3: Cross multiply
   147,410.72x = 220,043.56 × 128,748.32
4. Step 4: Simplify right side
   147,410.72x = 28,330,238,676.82
5. Step 5: Solve for x
   x = 28,330,238,676.82/147,410.72
6. Step 6: Final answer
   x = 192,185.74