Finding the Third Proportional to 58,123.51 and 89,778.06

Step by Step Solution

1. Step 1: Write the proportion equation
   58,123.51 : 89,778.06 = 89,778.06 : x
2. Step 2: Convert to fraction form
   58,123.51/89,778.06 = 89,778.06/x
3. Step 3: Cross multiply
   58,123.51x = 89,778.06 × 89,778.06
4. Step 4: Simplify right side
   58,123.51x = 8,060,099,804.86
5. Step 5: Solve for x
   x = 8,060,099,804.86/58,123.51
6. Step 6: Final answer
   x = 138,671.93