Finding the Fourth Proportional to 85,782.84, 128,678.36 and 41,446.88

Step by Step Solution

1. Step 1: Write the proportion equation
   85,782.84 : 128,678.36 = 41,446.88 : x
2. Step 2: Convert to fraction form
   85,782.84/128,678.36 = 41,446.88/x
3. Step 3: Cross multiply
   85,782.84x = 128,678.36 × 41,446.88
4. Step 4: Simplify right side
   85,782.84x = 5,333,315,694.89
5. Step 5: Solve for x
   x = 5,333,315,694.89/85,782.84
6. Step 6: Final answer
   x = 62,172.29