Finding the Fourth Proportional to 136,285, 204,429.34 and 42,790.76

Step by Step Solution

1. Step 1: Write the proportion equation
   136,285 : 204,429.34 = 42,790.76 : x
2. Step 2: Convert to fraction form
   136,285/204,429.34 = 42,790.76/x
3. Step 3: Cross multiply
   136,285x = 204,429.34 × 42,790.76
4. Step 4: Simplify right side
   136,285x = 8,747,686,824.90
5. Step 5: Solve for x
   x = 8,747,686,824.90/136,285
6. Step 6: Final answer
   x = 64,186.72