Finding the Fourth Proportional to 70,815.89, 106,289.46 and 35,780.15

Step by Step Solution

1. Step 1: Write the proportion equation
   70,815.89 : 106,289.46 = 35,780.15 : x
2. Step 2: Convert to fraction form
   70,815.89/106,289.46 = 35,780.15/x
3. Step 3: Cross multiply
   70,815.89x = 106,289.46 × 35,780.15
4. Step 4: Simplify right side
   70,815.89x = 3,803,053,087.94
5. Step 5: Solve for x
   x = 3,803,053,087.94/70,815.89
6. Step 6: Final answer
   x = 53,703.38