Finding the Fourth Proportional to 128,814.04, 177,746.46 and 71,452.72

Step by Step Solution

1. Step 1: Write the proportion equation
   128,814.04 : 177,746.46 = 71,452.72 : x
2. Step 2: Convert to fraction form
   128,814.04/177,746.46 = 71,452.72/x
3. Step 3: Cross multiply
   128,814.04x = 177,746.46 × 71,452.72
4. Step 4: Simplify right side
   128,814.04x = 12,700,468,037.37
5. Step 5: Solve for x
   x = 12,700,468,037.37/128,814.04
6. Step 6: Final answer
   x = 98,595.37