Finding the Fourth Proportional to 85,898.72, 128,885.16 and 46,483.64

Step by Step Solution

1. Step 1: Write the proportion equation
   85,898.72 : 128,885.16 = 46,483.64 : x
2. Step 2: Convert to fraction form
   85,898.72/128,885.16 = 46,483.64/x
3. Step 3: Cross multiply
   85,898.72x = 128,885.16 × 46,483.64
4. Step 4: Simplify right side
   85,898.72x = 5,991,051,378.78
5. Step 5: Solve for x
   x = 5,991,051,378.78/85,898.72
6. Step 6: Final answer
   x = 69,745.53