Finding the Fourth Proportional to 127,864.78, 191,729.43 and 56,756.50

Step by Step Solution

1. Step 1: Write the proportion equation
   127,864.78 : 191,729.43 = 56,756.50 : x
2. Step 2: Convert to fraction form
   127,864.78/191,729.43 = 56,756.50/x
3. Step 3: Cross multiply
   127,864.78x = 191,729.43 × 56,756.50
4. Step 4: Simplify right side
   127,864.78x = 10,881,890,914.47
5. Step 5: Solve for x
   x = 10,881,890,914.47/127,864.78
6. Step 6: Final answer
   x = 85,104.68