Finding the Fourth Proportional to 42,706.98, 64,118.79 and 28,676.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,706.98 : 64,118.79 = 28,676.16 : x
2. Step 2: Convert to fraction form
   42,706.98/64,118.79 = 28,676.16/x
3. Step 3: Cross multiply
   42,706.98x = 64,118.79 × 28,676.16
4. Step 4: Simplify right side
   42,706.98x = 1,838,680,681.05
5. Step 5: Solve for x
   x = 1,838,680,681.05/42,706.98
6. Step 6: Final answer
   x = 43,053.40