Finding the Fourth Proportional to 85,662.63, 128,424.69 and 35,780.94

Step by Step Solution

1. Step 1: Write the proportion equation
   85,662.63 : 128,424.69 = 35,780.94 : x
2. Step 2: Convert to fraction form
   85,662.63/128,424.69 = 35,780.94/x
3. Step 3: Cross multiply
   85,662.63x = 128,424.69 × 35,780.94
4. Step 4: Simplify right side
   85,662.63x = 4,595,156,127.41
5. Step 5: Solve for x
   x = 4,595,156,127.41/85,662.63
6. Step 6: Final answer
   x = 53,642.48