Finding the Fourth Proportional to 150,742.78, 208,014.63 and 83,669.50

Step by Step Solution

1. Step 1: Write the proportion equation
   150,742.78 : 208,014.63 = 83,669.50 : x
2. Step 2: Convert to fraction form
   150,742.78/208,014.63 = 83,669.50/x
3. Step 3: Cross multiply
   150,742.78x = 208,014.63 × 83,669.50
4. Step 4: Simplify right side
   150,742.78x = 17,404,480,084.79
5. Step 5: Solve for x
   x = 17,404,480,084.79/150,742.78
6. Step 6: Final answer
   x = 115,458.13