Finding the Fourth Proportional to 127,978.15, 191,967.31 and 53,078.19

Step by Step Solution

1. Step 1: Write the proportion equation
   127,978.15 : 191,967.31 = 53,078.19 : x
2. Step 2: Convert to fraction form
   127,978.15/191,967.31 = 53,078.19/x
3. Step 3: Cross multiply
   127,978.15x = 191,967.31 × 53,078.19
4. Step 4: Simplify right side
   127,978.15x = 10,189,276,570.23
5. Step 5: Solve for x
   x = 10,189,276,570.23/127,978.15
6. Step 6: Final answer
   x = 79,617.31