Finding the Third Proportional to 58,328 and 90,070

Step by Step Solution

1. Step 1: Write the proportion equation
   58,328 : 90,070 = 90,070 : x
2. Step 2: Convert to fraction form
   58,328/90,070 = 90,070/x
3. Step 3: Cross multiply
   58,328x = 90,070 × 90,070
4. Step 4: Simplify right side
   58,328x = 8,112,604,900
5. Step 5: Solve for x
   x = 8,112,604,900/58,328
6. Step 6: Final answer
   x = 139,085.94