Finding the Fourth Proportional to 151,513.50, 209,084.78 and 83,528.90

Step by Step Solution

1. Step 1: Write the proportion equation
   151,513.50 : 209,084.78 = 83,528.90 : x
2. Step 2: Convert to fraction form
   151,513.50/209,084.78 = 83,528.90/x
3. Step 3: Cross multiply
   151,513.50x = 209,084.78 × 83,528.90
4. Step 4: Simplify right side
   151,513.50x = 17,464,621,680.14
5. Step 5: Solve for x
   x = 17,464,621,680.14/151,513.50
6. Step 6: Final answer
   x = 115,267.76