Finding the Fourth Proportional to 136,143.46, 204,215.28 and 42,656.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,143.46 : 204,215.28 = 42,656.50 : x
2. Step 2: Convert to fraction form
   136,143.46/204,215.28 = 42,656.50/x
3. Step 3: Cross multiply
   136,143.46x = 204,215.28 × 42,656.50
4. Step 4: Simplify right side
   136,143.46x = 8,711,109,091.32
5. Step 5: Solve for x
   x = 8,711,109,091.32/136,143.46
6. Step 6: Final answer
   x = 63,984.78