Finding the Third Proportional to 58,507.50 and 89,872.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,507.50 : 89,872.50 = 89,872.50 : x
2. Step 2: Convert to fraction form
   58,507.50/89,872.50 = 89,872.50/x
3. Step 3: Cross multiply
   58,507.50x = 89,872.50 × 89,872.50
4. Step 4: Simplify right side
   58,507.50x = 8,077,066,256.25
5. Step 5: Solve for x
   x = 8,077,066,256.25/58,507.50
6. Step 6: Final answer
   x = 138,051.81