Finding the Fourth Proportional to 55,875.15, 83,815.35 and 18,438.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,875.15 : 83,815.35 = 18,438.50 : x
2. Step 2: Convert to fraction form
   55,875.15/83,815.35 = 18,438.50/x
3. Step 3: Cross multiply
   55,875.15x = 83,815.35 × 18,438.50
4. Step 4: Simplify right side
   55,875.15x = 1,545,428,911.90
5. Step 5: Solve for x
   x = 1,545,428,911.90/55,875.15
6. Step 6: Final answer
   x = 27,658.61