Finding the Fourth Proportional to 158,051.31, 236,827.28 and 128,323.91

Step by Step Solution

1. Step 1: Write the proportion equation
   158,051.31 : 236,827.28 = 128,323.91 : x
2. Step 2: Convert to fraction form
   158,051.31/236,827.28 = 128,323.91/x
3. Step 3: Cross multiply
   158,051.31x = 236,827.28 × 128,323.91
4. Step 4: Simplify right side
   158,051.31x = 30,390,600,738.51
5. Step 5: Solve for x
   x = 30,390,600,738.51/158,051.31
6. Step 6: Final answer
   x = 192,283.13