Finding the Fourth Proportional to 64,856.86, 89,495.91 and 47,870.38

Step by Step Solution

1. Step 1: Write the proportion equation
   64,856.86 : 89,495.91 = 47,870.38 : x
2. Step 2: Convert to fraction form
   64,856.86/89,495.91 = 47,870.38/x
3. Step 3: Cross multiply
   64,856.86x = 89,495.91 × 47,870.38
4. Step 4: Simplify right side
   64,856.86x = 4,284,203,220.15
5. Step 5: Solve for x
   x = 4,284,203,220.15/64,856.86
6. Step 6: Final answer
   x = 66,056.28