Finding the Fourth Proportional to 150,109.96, 207,061.50 and 99,123.16

Step by Step Solution

1. Step 1: Write the proportion equation
   150,109.96 : 207,061.50 = 99,123.16 : x
2. Step 2: Convert to fraction form
   150,109.96/207,061.50 = 99,123.16/x
3. Step 3: Cross multiply
   150,109.96x = 207,061.50 × 99,123.16
4. Step 4: Simplify right side
   150,109.96x = 20,524,590,194.34
5. Step 5: Solve for x
   x = 20,524,590,194.34/150,109.96
6. Step 6: Final answer
   x = 136,730.37