Finding the Fourth Proportional to 113,978.45, 157,297.71 and 75,678.03

Step by Step Solution

1. Step 1: Write the proportion equation
   113,978.45 : 157,297.71 = 75,678.03 : x
2. Step 2: Convert to fraction form
   113,978.45/157,297.71 = 75,678.03/x
3. Step 3: Cross multiply
   113,978.45x = 157,297.71 × 75,678.03
4. Step 4: Simplify right side
   113,978.45x = 11,903,980,816.31
5. Step 5: Solve for x
   x = 11,903,980,816.31/113,978.45
6. Step 6: Final answer
   x = 104,440.63