Finding the Fourth Proportional to 150,091.81, 207,131.60 and 85,559.86

Step by Step Solution

1. Step 1: Write the proportion equation
   150,091.81 : 207,131.60 = 85,559.86 : x
2. Step 2: Convert to fraction form
   150,091.81/207,131.60 = 85,559.86/x
3. Step 3: Cross multiply
   150,091.81x = 207,131.60 × 85,559.86
4. Step 4: Simplify right side
   150,091.81x = 17,722,150,697.58
5. Step 5: Solve for x
   x = 17,722,150,697.58/150,091.81
6. Step 6: Final answer
   x = 118,075.40