Finding the Fourth Proportional to 70,596.42, 105,931.59 and 28,486.98

Step by Step Solution

1. Step 1: Write the proportion equation
   70,596.42 : 105,931.59 = 28,486.98 : x
2. Step 2: Convert to fraction form
   70,596.42/105,931.59 = 28,486.98/x
3. Step 3: Cross multiply
   70,596.42x = 105,931.59 × 28,486.98
4. Step 4: Simplify right side
   70,596.42x = 3,017,671,085.70
5. Step 5: Solve for x
   x = 3,017,671,085.70/70,596.42
6. Step 6: Final answer
   x = 42,745.38