Finding the Fourth Proportional to 42,263.88, 58,311 and 28,119.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,263.88 : 58,311 = 28,119.12 : x
2. Step 2: Convert to fraction form
   42,263.88/58,311 = 28,119.12/x
3. Step 3: Cross multiply
   42,263.88x = 58,311 × 28,119.12
4. Step 4: Simplify right side
   42,263.88x = 1,639,654,006.32
5. Step 5: Solve for x
   x = 1,639,654,006.32/42,263.88
6. Step 6: Final answer
   x = 38,795.63