Finding the Fourth Proportional to 30,690.58, 42,429.11 and 30,410.37

Step by Step Solution

1. Step 1: Write the proportion equation
   30,690.58 : 42,429.11 = 30,410.37 : x
2. Step 2: Convert to fraction form
   30,690.58/42,429.11 = 30,410.37/x
3. Step 3: Cross multiply
   30,690.58x = 42,429.11 × 30,410.37
4. Step 4: Simplify right side
   30,690.58x = 1,290,285,009.90
5. Step 5: Solve for x
   x = 1,290,285,009.90/30,690.58
6. Step 6: Final answer
   x = 42,041.73