Finding the Fourth Proportional to 157,005.42, 216,665.41 and 85,383.91

Step by Step Solution

1. Step 1: Write the proportion equation
   157,005.42 : 216,665.41 = 85,383.91 : x
2. Step 2: Convert to fraction form
   157,005.42/216,665.41 = 85,383.91/x
3. Step 3: Cross multiply
   157,005.42x = 216,665.41 × 85,383.91
4. Step 4: Simplify right side
   157,005.42x = 18,499,739,867.55
5. Step 5: Solve for x
   x = 18,499,739,867.55/157,005.42
6. Step 6: Final answer
   x = 117,828.67