Finding the Fourth Proportional to 85,929.47, 128,945.24 and 46,485.71

Step by Step Solution

1. Step 1: Write the proportion equation
   85,929.47 : 128,945.24 = 46,485.71 : x
2. Step 2: Convert to fraction form
   85,929.47/128,945.24 = 46,485.71/x
3. Step 3: Cross multiply
   85,929.47x = 128,945.24 × 46,485.71
4. Step 4: Simplify right side
   85,929.47x = 5,994,111,032.52
5. Step 5: Solve for x
   x = 5,994,111,032.52/85,929.47
6. Step 6: Final answer
   x = 69,756.17