Finding the Fourth Proportional to 30,646.17, 42,284.25 and 18,705.15

Step by Step Solution

1. Step 1: Write the proportion equation
   30,646.17 : 42,284.25 = 18,705.15 : x
2. Step 2: Convert to fraction form
   30,646.17/42,284.25 = 18,705.15/x
3. Step 3: Cross multiply
   30,646.17x = 42,284.25 × 18,705.15
4. Step 4: Simplify right side
   30,646.17x = 790,933,238.89
5. Step 5: Solve for x
   x = 790,933,238.89/30,646.17
6. Step 6: Final answer
   x = 25,808.55