Finding the Fourth Proportional to 151,605.59, 209,301.42 and 100,705.56

Step by Step Solution

1. Step 1: Write the proportion equation
   151,605.59 : 209,301.42 = 100,705.56 : x
2. Step 2: Convert to fraction form
   151,605.59/209,301.42 = 100,705.56/x
3. Step 3: Cross multiply
   151,605.59x = 209,301.42 × 100,705.56
4. Step 4: Simplify right side
   151,605.59x = 21,077,816,913.51
5. Step 5: Solve for x
   x = 21,077,816,913.51/151,605.59
6. Step 6: Final answer
   x = 139,030.60