Finding the Fourth Proportional to 72.60, 109.00 and 46.57

Step by Step Solution

1. Step 1: Write the proportion equation
   72.60 : 109.00 = 46.57 : x
2. Step 2: Convert to fraction form
   72.60/109.00 = 46.57/x
3. Step 3: Cross multiply
   72.60x = 109.00 × 46.57
4. Step 4: Simplify right side
   72.60x = 5,075.78
5. Step 5: Solve for x
   x = 5,075.78/72.60
6. Step 6: Final answer
   x = 69.91