Finding the Fourth Proportional to 57,878.86, 86,834.72 and 18,439.02

Step by Step Solution

1. Step 1: Write the proportion equation
   57,878.86 : 86,834.72 = 18,439.02 : x
2. Step 2: Convert to fraction form
   57,878.86/86,834.72 = 18,439.02/x
3. Step 3: Cross multiply
   57,878.86x = 86,834.72 × 18,439.02
4. Step 4: Simplify right side
   57,878.86x = 1,601,147,138.77
5. Step 5: Solve for x
   x = 1,601,147,138.77/57,878.86
6. Step 6: Final answer
   x = 27,663.76