Finding the Fourth Proportional to 127,784.40, 191,713.62 and 52,890.72

Step by Step Solution

1. Step 1: Write the proportion equation
   127,784.40 : 191,713.62 = 52,890.72 : x
2. Step 2: Convert to fraction form
   127,784.40/191,713.62 = 52,890.72/x
3. Step 3: Cross multiply
   127,784.40x = 191,713.62 × 52,890.72
4. Step 4: Simplify right side
   127,784.40x = 10,139,871,395.61
5. Step 5: Solve for x
   x = 10,139,871,395.61/127,784.40
6. Step 6: Final answer
   x = 79,351.40