Finding the Fourth Proportional to 191,816.89, 287,746.88 and 156,578.18

Step by Step Solution

1. Step 1: Write the proportion equation
   191,816.89 : 287,746.88 = 156,578.18 : x
2. Step 2: Convert to fraction form
   191,816.89/287,746.88 = 156,578.18/x
3. Step 3: Cross multiply
   191,816.89x = 287,746.88 × 156,578.18
4. Step 4: Simplify right side
   191,816.89x = 45,054,880,549.45
5. Step 5: Solve for x
   x = 45,054,880,549.45/191,816.89
6. Step 6: Final answer
   x = 234,884.85