Finding the Fourth Proportional to 127,970.91, 191,874.34 and 53,142.70

Step by Step Solution

1. Step 1: Write the proportion equation
   127,970.91 : 191,874.34 = 53,142.70 : x
2. Step 2: Convert to fraction form
   127,970.91/191,874.34 = 53,142.70/x
3. Step 3: Cross multiply
   127,970.91x = 191,874.34 × 53,142.70
4. Step 4: Simplify right side
   127,970.91x = 10,196,720,488.32
5. Step 5: Solve for x
   x = 10,196,720,488.32/127,970.91
6. Step 6: Final answer
   x = 79,679.99