Finding the Fourth Proportional to 152,168.18, 209,991.93 and 85,100.18

Step by Step Solution

1. Step 1: Write the proportion equation
   152,168.18 : 209,991.93 = 85,100.18 : x
2. Step 2: Convert to fraction form
   152,168.18/209,991.93 = 85,100.18/x
3. Step 3: Cross multiply
   152,168.18x = 209,991.93 × 85,100.18
4. Step 4: Simplify right side
   152,168.18x = 17,870,351,041.55
5. Step 5: Solve for x
   x = 17,870,351,041.55/152,168.18
6. Step 6: Final answer
   x = 117,438.16