Finding the Fourth Proportional to 148,783.89, 205,357.50 and 85,158.60

Step by Step Solution

1. Step 1: Write the proportion equation
   148,783.89 : 205,357.50 = 85,158.60 : x
2. Step 2: Convert to fraction form
   148,783.89/205,357.50 = 85,158.60/x
3. Step 3: Cross multiply
   148,783.89x = 205,357.50 × 85,158.60
4. Step 4: Simplify right side
   148,783.89x = 17,487,957,199.50
5. Step 5: Solve for x
   x = 17,487,957,199.50/148,783.89
6. Step 6: Final answer
   x = 117,539.32