Finding the Fourth Proportional to 216,111.42, 324,001.89 and 178,553.34

Step by Step Solution

1. Step 1: Write the proportion equation
   216,111.42 : 324,001.89 = 178,553.34 : x
2. Step 2: Convert to fraction form
   216,111.42/324,001.89 = 178,553.34/x
3. Step 3: Cross multiply
   216,111.42x = 324,001.89 × 178,553.34
4. Step 4: Simplify right side
   216,111.42x = 57,851,619,625.81
5. Step 5: Solve for x
   x = 57,851,619,625.81/216,111.42
6. Step 6: Final answer
   x = 267,693.49