Finding the Fourth Proportional to 285,737.89, 428,564.71 and 75,390.61

Step by Step Solution

1. Step 1: Write the proportion equation
   285,737.89 : 428,564.71 = 75,390.61 : x
2. Step 2: Convert to fraction form
   285,737.89/428,564.71 = 75,390.61/x
3. Step 3: Cross multiply
   285,737.89x = 428,564.71 × 75,390.61
4. Step 4: Simplify right side
   285,737.89x = 32,309,754,911.37
5. Step 5: Solve for x
   x = 32,309,754,911.37/285,737.89
6. Step 6: Final answer
   x = 113,074.80