Finding the Fourth Proportional to 30,742.30, 42,412.06 and 18,784.88

Step by Step Solution

1. Step 1: Write the proportion equation
   30,742.30 : 42,412.06 = 18,784.88 : x
2. Step 2: Convert to fraction form
   30,742.30/42,412.06 = 18,784.88/x
3. Step 3: Cross multiply
   30,742.30x = 42,412.06 × 18,784.88
4. Step 4: Simplify right side
   30,742.30x = 796,705,322.45
5. Step 5: Solve for x
   x = 796,705,322.45/30,742.30
6. Step 6: Final answer
   x = 25,915.60