Finding the Fourth Proportional to 30,889.98, 42,374.43 and 30,068.64

Step by Step Solution

1. Step 1: Write the proportion equation
   30,889.98 : 42,374.43 = 30,068.64 : x
2. Step 2: Convert to fraction form
   30,889.98/42,374.43 = 30,068.64/x
3. Step 3: Cross multiply
   30,889.98x = 42,374.43 × 30,068.64
4. Step 4: Simplify right side
   30,889.98x = 1,274,141,480.88
5. Step 5: Solve for x
   x = 1,274,141,480.88/30,889.98
6. Step 6: Final answer
   x = 41,247.73