Finding the Fourth Proportional to 150,817.50, 208,128.15 and 83,749.50

Step by Step Solution

1. Step 1: Write the proportion equation
   150,817.50 : 208,128.15 = 83,749.50 : x
2. Step 2: Convert to fraction form
   150,817.50/208,128.15 = 83,749.50/x
3. Step 3: Cross multiply
   150,817.50x = 208,128.15 × 83,749.50
4. Step 4: Simplify right side
   150,817.50x = 17,430,628,498.43
5. Step 5: Solve for x
   x = 17,430,628,498.43/150,817.50
6. Step 6: Final answer
   x = 115,574.31