Finding the Fourth Proportional to 30,898.35, 42,646.77 and 18,153

Step by Step Solution

1. Step 1: Write the proportion equation
   30,898.35 : 42,646.77 = 18,153 : x
2. Step 2: Convert to fraction form
   30,898.35/42,646.77 = 18,153/x
3. Step 3: Cross multiply
   30,898.35x = 42,646.77 × 18,153
4. Step 4: Simplify right side
   30,898.35x = 774,166,815.81
5. Step 5: Solve for x
   x = 774,166,815.81/30,898.35
6. Step 6: Final answer
   x = 25,055.28