Finding the Fourth Proportional to 72,785.95, 109,113.98 and 28,402.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,785.95 : 109,113.98 = 28,402.38 : x
2. Step 2: Convert to fraction form
   72,785.95/109,113.98 = 28,402.38/x
3. Step 3: Cross multiply
   72,785.95x = 109,113.98 × 28,402.38
4. Step 4: Simplify right side
   72,785.95x = 3,099,096,581.26
5. Step 5: Solve for x
   x = 3,099,096,581.26/72,785.95
6. Step 6: Final answer
   x = 42,578.23