Finding the Fourth Proportional to 100,978.49, 151,498.50 and 47,711.37

Step by Step Solution

1. Step 1: Write the proportion equation
   100,978.49 : 151,498.50 = 47,711.37 : x
2. Step 2: Convert to fraction form
   100,978.49/151,498.50 = 47,711.37/x
3. Step 3: Cross multiply
   100,978.49x = 151,498.50 × 47,711.37
4. Step 4: Simplify right side
   100,978.49x = 7,228,200,749.39
5. Step 5: Solve for x
   x = 7,228,200,749.39/100,978.49
6. Step 6: Final answer
   x = 71,581.59