Finding the Fourth Proportional to 171,333.51, 236,514.38 and 128,902.47

Step by Step Solution

1. Step 1: Write the proportion equation
   171,333.51 : 236,514.38 = 128,902.47 : x
2. Step 2: Convert to fraction form
   171,333.51/236,514.38 = 128,902.47/x
3. Step 3: Cross multiply
   171,333.51x = 236,514.38 × 128,902.47
4. Step 4: Simplify right side
   171,333.51x = 30,487,287,128.01
5. Step 5: Solve for x
   x = 30,487,287,128.01/171,333.51
6. Step 6: Final answer
   x = 177,941.18