Finding the Third Proportional to 61,030.13 and 138,010.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,030.13 : 138,010.50 = 138,010.50 : x
2. Step 2: Convert to fraction form
   61,030.13/138,010.50 = 138,010.50/x
3. Step 3: Cross multiply
   61,030.13x = 138,010.50 × 138,010.50
4. Step 4: Simplify right side
   61,030.13x = 19,046,898,110.25
5. Step 5: Solve for x
   x = 19,046,898,110.25/61,030.13
6. Step 6: Final answer
   x = 312,090.10