Finding the Fourth Proportional to 136,019.30, 204,048.15 and 42,515.30

Step by Step Solution

1. Step 1: Write the proportion equation
   136,019.30 : 204,048.15 = 42,515.30 : x
2. Step 2: Convert to fraction form
   136,019.30/204,048.15 = 42,515.30/x
3. Step 3: Cross multiply
   136,019.30x = 204,048.15 × 42,515.30
4. Step 4: Simplify right side
   136,019.30x = 8,675,168,311.70
5. Step 5: Solve for x
   x = 8,675,168,311.70/136,019.30
6. Step 6: Final answer
   x = 63,778.95