Finding the Fourth Proportional to 42,357.39, 63,455.89 and 28,274.95

Step by Step Solution

1. Step 1: Write the proportion equation
   42,357.39 : 63,455.89 = 28,274.95 : x
2. Step 2: Convert to fraction form
   42,357.39/63,455.89 = 28,274.95/x
3. Step 3: Cross multiply
   42,357.39x = 63,455.89 × 28,274.95
4. Step 4: Simplify right side
   42,357.39x = 1,794,212,116.96
5. Step 5: Solve for x
   x = 1,794,212,116.96/42,357.39
6. Step 6: Final answer
   x = 42,358.89