Finding the Fourth Proportional to 238,618.29, 357,851.37 and 78,664.42

Step by Step Solution

1. Step 1: Write the proportion equation
   238,618.29 : 357,851.37 = 78,664.42 : x
2. Step 2: Convert to fraction form
   238,618.29/357,851.37 = 78,664.42/x
3. Step 3: Cross multiply
   238,618.29x = 357,851.37 × 78,664.42
4. Step 4: Simplify right side
   238,618.29x = 28,150,168,754.16
5. Step 5: Solve for x
   x = 28,150,168,754.16/238,618.29
6. Step 6: Final answer
   x = 117,971.55