Finding the Fourth Proportional to 127,431.72, 191,040.66 and 56,342.88

Step by Step Solution

1. Step 1: Write the proportion equation
   127,431.72 : 191,040.66 = 56,342.88 : x
2. Step 2: Convert to fraction form
   127,431.72/191,040.66 = 56,342.88/x
3. Step 3: Cross multiply
   127,431.72x = 191,040.66 × 56,342.88
4. Step 4: Simplify right side
   127,431.72x = 10,763,780,981.50
5. Step 5: Solve for x
   x = 10,763,780,981.50/127,431.72
6. Step 6: Final answer
   x = 84,467.05