Finding the Fourth Proportional to 147,412.48, 203,403.69 and 86,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   147,412.48 : 203,403.69 = 86,978.56 : x
2. Step 2: Convert to fraction form
   147,412.48/203,403.69 = 86,978.56/x
3. Step 3: Cross multiply
   147,412.48x = 203,403.69 × 86,978.56
4. Step 4: Simplify right side
   147,412.48x = 17,691,760,054.89
5. Step 5: Solve for x
   x = 17,691,760,054.89/147,412.48
6. Step 6: Final answer
   x = 120,015.35