Finding the Third Proportional to 91,000.13 and 139,669.31

Step by Step Solution

1. Step 1: Write the proportion equation
   91,000.13 : 139,669.31 = 139,669.31 : x
2. Step 2: Convert to fraction form
   91,000.13/139,669.31 = 139,669.31/x
3. Step 3: Cross multiply
   91,000.13x = 139,669.31 × 139,669.31
4. Step 4: Simplify right side
   91,000.13x = 19,507,516,854.22
5. Step 5: Solve for x
   x = 19,507,516,854.22/91,000.13
6. Step 6: Final answer
   x = 214,368.02