Finding the Fourth Proportional to 149,945.42, 206,926.05 and 85,413.72

Step by Step Solution

1. Step 1: Write the proportion equation
   149,945.42 : 206,926.05 = 85,413.72 : x
2. Step 2: Convert to fraction form
   149,945.42/206,926.05 = 85,413.72/x
3. Step 3: Cross multiply
   149,945.42x = 206,926.05 × 85,413.72
4. Step 4: Simplify right side
   149,945.42x = 17,674,323,695.41
5. Step 5: Solve for x
   x = 17,674,323,695.41/149,945.42
6. Step 6: Final answer
   x = 117,871.72