Finding the Fourth Proportional to 271,498.51, 407,271.69 and 100,722.20

Step by Step Solution

1. Step 1: Write the proportion equation
   271,498.51 : 407,271.69 = 100,722.20 : x
2. Step 2: Convert to fraction form
   271,498.51/407,271.69 = 100,722.20/x
3. Step 3: Cross multiply
   271,498.51x = 407,271.69 × 100,722.20
4. Step 4: Simplify right side
   271,498.51x = 41,021,300,006.89
5. Step 5: Solve for x
   x = 41,021,300,006.89/271,498.51
6. Step 6: Final answer
   x = 151,092.17