Finding the Third Proportional to 58,112 and 87,090

Step by Step Solution

1. Step 1: Write the proportion equation
   58,112 : 87,090 = 87,090 : x
2. Step 2: Convert to fraction form
   58,112/87,090 = 87,090/x
3. Step 3: Cross multiply
   58,112x = 87,090 × 87,090
4. Step 4: Simplify right side
   58,112x = 7,584,668,100
5. Step 5: Solve for x
   x = 7,584,668,100/58,112
6. Step 6: Final answer
   x = 130,518.10