Finding the Fourth Proportional to 147,616.57, 221,807.59 and 128,946.88

Step by Step Solution

1. Step 1: Write the proportion equation
   147,616.57 : 221,807.59 = 128,946.88 : x
2. Step 2: Convert to fraction form
   147,616.57/221,807.59 = 128,946.88/x
3. Step 3: Cross multiply
   147,616.57x = 221,807.59 × 128,946.88
4. Step 4: Simplify right side
   147,616.57x = 28,601,396,690.82
5. Step 5: Solve for x
   x = 28,601,396,690.82/147,616.57
6. Step 6: Final answer
   x = 193,754.65