Finding the Fourth Proportional to 72,948.40, 109,422.49 and 28,543.99

Step by Step Solution

1. Step 1: Write the proportion equation
   72,948.40 : 109,422.49 = 28,543.99 : x
2. Step 2: Convert to fraction form
   72,948.40/109,422.49 = 28,543.99/x
3. Step 3: Cross multiply
   72,948.40x = 109,422.49 × 28,543.99
4. Step 4: Simplify right side
   72,948.40x = 3,123,354,222.46
5. Step 5: Solve for x
   x = 3,123,354,222.46/72,948.40
6. Step 6: Final answer
   x = 42,815.94