Finding the Fourth Proportional to 139,322.28, 192,276.72 and 78,903.58

Step by Step Solution

1. Step 1: Write the proportion equation
   139,322.28 : 192,276.72 = 78,903.58 : x
2. Step 2: Convert to fraction form
   139,322.28/192,276.72 = 78,903.58/x
3. Step 3: Cross multiply
   139,322.28x = 192,276.72 × 78,903.58
4. Step 4: Simplify right side
   139,322.28x = 15,171,321,558.66
5. Step 5: Solve for x
   x = 15,171,321,558.66/139,322.28
6. Step 6: Final answer
   x = 108,893.72