Finding the Fourth Proportional to 421,870.33, 632,871.48 and 137,494.82

Step by Step Solution

1. Step 1: Write the proportion equation
   421,870.33 : 632,871.48 = 137,494.82 : x
2. Step 2: Convert to fraction form
   421,870.33/632,871.48 = 137,494.82/x
3. Step 3: Cross multiply
   421,870.33x = 632,871.48 × 137,494.82
4. Step 4: Simplify right side
   421,870.33x = 87,016,547,990.21
5. Step 5: Solve for x
   x = 87,016,547,990.21/421,870.33
6. Step 6: Final answer
   x = 206,263.73