Finding the Fourth Proportional to 42,984.77, 64,393.27 and 28,148.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42,984.77 : 64,393.27 = 28,148.70 : x
2. Step 2: Convert to fraction form
   42,984.77/64,393.27 = 28,148.70/x
3. Step 3: Cross multiply
   42,984.77x = 64,393.27 × 28,148.70
4. Step 4: Simplify right side
   42,984.77x = 1,812,587,168.69
5. Step 5: Solve for x
   x = 1,812,587,168.69/42,984.77
6. Step 6: Final answer
   x = 42,168.13