Finding the Fourth Proportional to 42,256.16, 63,290.81 and 28,897.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,256.16 : 63,290.81 = 28,897.50 : x
2. Step 2: Convert to fraction form
   42,256.16/63,290.81 = 28,897.50/x
3. Step 3: Cross multiply
   42,256.16x = 63,290.81 × 28,897.50
4. Step 4: Simplify right side
   42,256.16x = 1,828,945,800.15
5. Step 5: Solve for x
   x = 1,828,945,800.15/42,256.16
6. Step 6: Final answer
   x = 43,282.35