Finding the Third Proportional to 56,588.63 and 85,429.69

Step by Step Solution

1. Step 1: Write the proportion equation
   56,588.63 : 85,429.69 = 85,429.69 : x
2. Step 2: Convert to fraction form
   56,588.63/85,429.69 = 85,429.69/x
3. Step 3: Cross multiply
   56,588.63x = 85,429.69 × 85,429.69
4. Step 4: Simplify right side
   56,588.63x = 7,298,231,506.35
5. Step 5: Solve for x
   x = 7,298,231,506.35/56,588.63
6. Step 6: Final answer
   x = 128,969.94