Finding the Fourth Proportional to 171,429.51, 236,573.41 and 99,858.72

Step by Step Solution

1. Step 1: Write the proportion equation
   171,429.51 : 236,573.41 = 99,858.72 : x
2. Step 2: Convert to fraction form
   171,429.51/236,573.41 = 99,858.72/x
3. Step 3: Cross multiply
   171,429.51x = 236,573.41 × 99,858.72
4. Step 4: Simplify right side
   171,429.51x = 23,623,918,733.37
5. Step 5: Solve for x
   x = 23,623,918,733.37/171,429.51
6. Step 6: Final answer
   x = 137,805.44