Finding the Fourth Proportional to 42,902.45, 59,139.75 and 30,119.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,902.45 : 59,139.75 = 30,119.78 : x
2. Step 2: Convert to fraction form
   42,902.45/59,139.75 = 30,119.78/x
3. Step 3: Cross multiply
   42,902.45x = 59,139.75 × 30,119.78
4. Step 4: Simplify right side
   42,902.45x = 1,781,276,038.86
5. Step 5: Solve for x
   x = 1,781,276,038.86/42,902.45
6. Step 6: Final answer
   x = 41,519.21