Finding the Fourth Proportional to 148,467.78, 204,978.96 and 103,131.18

Step by Step Solution

1. Step 1: Write the proportion equation
   148,467.78 : 204,978.96 = 103,131.18 : x
2. Step 2: Convert to fraction form
   148,467.78/204,978.96 = 103,131.18/x
3. Step 3: Cross multiply
   148,467.78x = 204,978.96 × 103,131.18
4. Step 4: Simplify right side
   148,467.78x = 21,139,722,019.97
5. Step 5: Solve for x
   x = 21,139,722,019.97/148,467.78
6. Step 6: Final answer
   x = 142,385.92