Finding the Fourth Proportional to 151,389.91, 208,917.10 and 83,405.31

Step by Step Solution

1. Step 1: Write the proportion equation
   151,389.91 : 208,917.10 = 83,405.31 : x
2. Step 2: Convert to fraction form
   151,389.91/208,917.10 = 83,405.31/x
3. Step 3: Cross multiply
   151,389.91x = 208,917.10 × 83,405.31
4. Step 4: Simplify right side
   151,389.91x = 17,424,795,072.77
5. Step 5: Solve for x
   x = 17,424,795,072.77/151,389.91
6. Step 6: Final answer
   x = 115,098.79