Finding the Fourth Proportional to 127,428.94, 191,196.06 and 64,215.28

Step by Step Solution

1. Step 1: Write the proportion equation
   127,428.94 : 191,196.06 = 64,215.28 : x
2. Step 2: Convert to fraction form
   127,428.94/191,196.06 = 64,215.28/x
3. Step 3: Cross multiply
   127,428.94x = 191,196.06 × 64,215.28
4. Step 4: Simplify right side
   127,428.94x = 12,277,708,527.80
5. Step 5: Solve for x
   x = 12,277,708,527.80/127,428.94
6. Step 6: Final answer
   x = 96,349.45