Finding the Fourth Proportional to 91,630.72, 137,467.59 and 28,447.62

Step by Step Solution

1. Step 1: Write the proportion equation
   91,630.72 : 137,467.59 = 28,447.62 : x
2. Step 2: Convert to fraction form
   91,630.72/137,467.59 = 28,447.62/x
3. Step 3: Cross multiply
   91,630.72x = 137,467.59 × 28,447.62
4. Step 4: Simplify right side
   91,630.72x = 3,910,625,075.30
5. Step 5: Solve for x
   x = 3,910,625,075.30/91,630.72
6. Step 6: Final answer
   x = 42,678.10