Finding the Fourth Proportional to 128,308.16, 192,449.86 and 39,537.83

Step by Step Solution

1. Step 1: Write the proportion equation
   128,308.16 : 192,449.86 = 39,537.83 : x
2. Step 2: Convert to fraction form
   128,308.16/192,449.86 = 39,537.83/x
3. Step 3: Cross multiply
   128,308.16x = 192,449.86 × 39,537.83
4. Step 4: Simplify right side
   128,308.16x = 7,609,049,009.51
5. Step 5: Solve for x
   x = 7,609,049,009.51/128,308.16
6. Step 6: Final answer
   x = 59,302.93