Finding the Fourth Proportional to 72,100.68, 107,929.26 and 47,086.80

Step by Step Solution

1. Step 1: Write the proportion equation
   72,100.68 : 107,929.26 = 47,086.80 : x
2. Step 2: Convert to fraction form
   72,100.68/107,929.26 = 47,086.80/x
3. Step 3: Cross multiply
   72,100.68x = 107,929.26 × 47,086.80
4. Step 4: Simplify right side
   72,100.68x = 5,082,043,479.77
5. Step 5: Solve for x
   x = 5,082,043,479.77/72,100.68
6. Step 6: Final answer
   x = 70,485.38