Finding the Fourth Proportional to 151,131.79, 208,561.86 and 83,147.31

Step by Step Solution

1. Step 1: Write the proportion equation
   151,131.79 : 208,561.86 = 83,147.31 : x
2. Step 2: Convert to fraction form
   151,131.79/208,561.86 = 83,147.31/x
3. Step 3: Cross multiply
   151,131.79x = 208,561.86 × 83,147.31
4. Step 4: Simplify right side
   151,131.79x = 17,341,357,627.60
5. Step 5: Solve for x
   x = 17,341,357,627.60/151,131.79
6. Step 6: Final answer
   x = 114,743.28