Finding the Fourth Proportional to 152,021.82, 209,849.31 and 136,078.70

Step by Step Solution

1. Step 1: Write the proportion equation
   152,021.82 : 209,849.31 = 136,078.70 : x
2. Step 2: Convert to fraction form
   152,021.82/209,849.31 = 136,078.70/x
3. Step 3: Cross multiply
   152,021.82x = 209,849.31 × 136,078.70
4. Step 4: Simplify right side
   152,021.82x = 28,556,021,300.70
5. Step 5: Solve for x
   x = 28,556,021,300.70/152,021.82
6. Step 6: Final answer
   x = 187,841.60