Finding the Fourth Proportional to 42,190.40, 63,170.31 and 30,356.00

Step by Step Solution

1. Step 1: Write the proportion equation
   42,190.40 : 63,170.31 = 30,356.00 : x
2. Step 2: Convert to fraction form
   42,190.40/63,170.31 = 30,356.00/x
3. Step 3: Cross multiply
   42,190.40x = 63,170.31 × 30,356.00
4. Step 4: Simplify right side
   42,190.40x = 1,917,597,614.51
5. Step 5: Solve for x
   x = 1,917,597,614.51/42,190.40
6. Step 6: Final answer
   x = 45,451.05