Finding the Fourth Proportional to 42,190.90, 63,171.06 and 30,356.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,190.90 : 63,171.06 = 30,356.50 : x
2. Step 2: Convert to fraction form
   42,190.90/63,171.06 = 30,356.50/x
3. Step 3: Cross multiply
   42,190.90x = 63,171.06 × 30,356.50
4. Step 4: Simplify right side
   42,190.90x = 1,917,651,967.03
5. Step 5: Solve for x
   x = 1,917,651,967.03/42,190.90
6. Step 6: Final answer
   x = 45,451.80