Finding the Fourth Proportional to 66,572.18, 91,870.23 and 37,890.44

Step by Step Solution

1. Step 1: Write the proportion equation
   66,572.18 : 91,870.23 = 37,890.44 : x
2. Step 2: Convert to fraction form
   66,572.18/91,870.23 = 37,890.44/x
3. Step 3: Cross multiply
   66,572.18x = 91,870.23 × 37,890.44
4. Step 4: Simplify right side
   66,572.18x = 3,481,002,978.25
5. Step 5: Solve for x
   x = 3,481,002,978.25/66,572.18
6. Step 6: Final answer
   x = 52,289.15