Finding the Fourth Proportional to 127,513.60, 190,978.80 and 65,111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   127,513.60 : 190,978.80 = 65,111.20 : x
2. Step 2: Convert to fraction form
   127,513.60/190,978.80 = 65,111.20/x
3. Step 3: Cross multiply
   127,513.60x = 190,978.80 × 65,111.20
4. Step 4: Simplify right side
   127,513.60x = 12,434,858,842.56
5. Step 5: Solve for x
   x = 12,434,858,842.56/127,513.60
6. Step 6: Final answer
   x = 97,517.90