Finding the Fourth Proportional to 85,870.72, 128,843.16 and 46,455.58

Step by Step Solution

1. Step 1: Write the proportion equation
   85,870.72 : 128,843.16 = 46,455.58 : x
2. Step 2: Convert to fraction form
   85,870.72/128,843.16 = 46,455.58/x
3. Step 3: Cross multiply
   85,870.72x = 128,843.16 × 46,455.58
4. Step 4: Simplify right side
   85,870.72x = 5,985,483,726.83
5. Step 5: Solve for x
   x = 5,985,483,726.83/85,870.72
6. Step 6: Final answer
   x = 69,703.43