Finding the Fourth Proportional to 30,675.84, 42,301.50 and 28,889.94

Step by Step Solution

1. Step 1: Write the proportion equation
   30,675.84 : 42,301.50 = 28,889.94 : x
2. Step 2: Convert to fraction form
   30,675.84/42,301.50 = 28,889.94/x
3. Step 3: Cross multiply
   30,675.84x = 42,301.50 × 28,889.94
4. Step 4: Simplify right side
   30,675.84x = 1,222,087,796.91
5. Step 5: Solve for x
   x = 1,222,087,796.91/30,675.84
6. Step 6: Final answer
   x = 39,838.77