Finding the Fourth Proportional to 55,890.81, 83,843.71 and 20,347.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,890.81 : 83,843.71 = 20,347.50 : x
2. Step 2: Convert to fraction form
   55,890.81/83,843.71 = 20,347.50/x
3. Step 3: Cross multiply
   55,890.81x = 83,843.71 × 20,347.50
4. Step 4: Simplify right side
   55,890.81x = 1,706,010,152.77
5. Step 5: Solve for x
   x = 1,706,010,152.77/55,890.81
6. Step 6: Final answer
   x = 30,523.98