Finding the Fourth Proportional to 86,145.47, 128,941.57 and 46,064.14

Step by Step Solution

1. Step 1: Write the proportion equation
   86,145.47 : 128,941.57 = 46,064.14 : x
2. Step 2: Convert to fraction form
   86,145.47/128,941.57 = 46,064.14/x
3. Step 3: Cross multiply
   86,145.47x = 128,941.57 × 46,064.14
4. Step 4: Simplify right side
   86,145.47x = 5,939,582,992.82
5. Step 5: Solve for x
   x = 5,939,582,992.82/86,145.47
6. Step 6: Final answer
   x = 68,948.29