Finding the Fourth Proportional to 42,678.72, 58,890.78 and 23,812.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,678.72 : 58,890.78 = 23,812.20 : x
2. Step 2: Convert to fraction form
   42,678.72/58,890.78 = 23,812.20/x
3. Step 3: Cross multiply
   42,678.72x = 58,890.78 × 23,812.20
4. Step 4: Simplify right side
   42,678.72x = 1,402,319,031.52
5. Step 5: Solve for x
   x = 1,402,319,031.52/42,678.72
6. Step 6: Final answer
   x = 32,857.57