Finding the Fourth Proportional to 142,347.52, 196,438.56 and 78,684.16

Step by Step Solution

1. Step 1: Write the proportion equation
   142,347.52 : 196,438.56 = 78,684.16 : x
2. Step 2: Convert to fraction form
   142,347.52/196,438.56 = 78,684.16/x
3. Step 3: Cross multiply
   142,347.52x = 196,438.56 × 78,684.16
4. Step 4: Simplify right side
   142,347.52x = 15,456,603,085.21
5. Step 5: Solve for x
   x = 15,456,603,085.21/142,347.52
6. Step 6: Final answer
   x = 108,583.58