Finding the Third Proportional to 58,140.56 and 78,905.06

Step by Step Solution

1. Step 1: Write the proportion equation
   58,140.56 : 78,905.06 = 78,905.06 : x
2. Step 2: Convert to fraction form
   58,140.56/78,905.06 = 78,905.06/x
3. Step 3: Cross multiply
   58,140.56x = 78,905.06 × 78,905.06
4. Step 4: Simplify right side
   58,140.56x = 6,226,008,888.13
5. Step 5: Solve for x
   x = 6,226,008,888.13/58,140.56
6. Step 6: Final answer
   x = 107,085.46