Finding the Fourth Proportional to 139,901.88, 193,137.72 and 108,788.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,901.88 : 193,137.72 = 108,788.16 : x
2. Step 2: Convert to fraction form
   139,901.88/193,137.72 = 108,788.16/x
3. Step 3: Cross multiply
   139,901.88x = 193,137.72 × 108,788.16
4. Step 4: Simplify right side
   139,901.88x = 21,011,097,185.40
5. Step 5: Solve for x
   x = 21,011,097,185.40/139,901.88
6. Step 6: Final answer
   x = 150,184.52