Finding the Fourth Proportional to 287,162.42, 430,087.52 and 137,507.83

Step by Step Solution

1. Step 1: Write the proportion equation
   287,162.42 : 430,087.52 = 137,507.83 : x
2. Step 2: Convert to fraction form
   287,162.42/430,087.52 = 137,507.83/x
3. Step 3: Cross multiply
   287,162.42x = 430,087.52 × 137,507.83
4. Step 4: Simplify right side
   287,162.42x = 59,140,400,853.83
5. Step 5: Solve for x
   x = 59,140,400,853.83/287,162.42
6. Step 6: Final answer
   x = 205,947.57