Finding the Fourth Proportional to 70,486, 105,781.54 and 28,366.42

Step by Step Solution

1. Step 1: Write the proportion equation
   70,486 : 105,781.54 = 28,366.42 : x
2. Step 2: Convert to fraction form
   70,486/105,781.54 = 28,366.42/x
3. Step 3: Cross multiply
   70,486x = 105,781.54 × 28,366.42
4. Step 4: Simplify right side
   70,486x = 3,000,643,591.89
5. Step 5: Solve for x
   x = 3,000,643,591.89/70,486
6. Step 6: Final answer
   x = 42,570.77