Finding the Fourth Proportional to 30,683.84, 42,312.52 and 28,897.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,683.84 : 42,312.52 = 28,897.96 : x
2. Step 2: Convert to fraction form
   30,683.84/42,312.52 = 28,897.96/x
3. Step 3: Cross multiply
   30,683.84x = 42,312.52 × 28,897.96
4. Step 4: Simplify right side
   30,683.84x = 1,222,745,510.46
5. Step 5: Solve for x
   x = 1,222,745,510.46/30,683.84
6. Step 6: Final answer
   x = 39,849.82