Finding the Fourth Proportional to 34,654.71, 47,780.17 and 28,920.43

Step by Step Solution

1. Step 1: Write the proportion equation
   34,654.71 : 47,780.17 = 28,920.43 : x
2. Step 2: Convert to fraction form
   34,654.71/47,780.17 = 28,920.43/x
3. Step 3: Cross multiply
   34,654.71x = 47,780.17 × 28,920.43
4. Step 4: Simplify right side
   34,654.71x = 1,381,823,061.87
5. Step 5: Solve for x
   x = 1,381,823,061.87/34,654.71
6. Step 6: Final answer
   x = 39,874.03