Finding the Fourth Proportional to 56,957.42, 85,488.18 and 28,896.80

Step by Step Solution

1. Step 1: Write the proportion equation
   56,957.42 : 85,488.18 = 28,896.80 : x
2. Step 2: Convert to fraction form
   56,957.42/85,488.18 = 28,896.80/x
3. Step 3: Cross multiply
   56,957.42x = 85,488.18 × 28,896.80
4. Step 4: Simplify right side
   56,957.42x = 2,470,334,839.82
5. Step 5: Solve for x
   x = 2,470,334,839.82/56,957.42
6. Step 6: Final answer
   x = 43,371.61