Finding the Third Proportional to 58,460 and 90,428

Step by Step Solution

1. Step 1: Write the proportion equation
   58,460 : 90,428 = 90,428 : x
2. Step 2: Convert to fraction form
   58,460/90,428 = 90,428/x
3. Step 3: Cross multiply
   58,460x = 90,428 × 90,428
4. Step 4: Simplify right side
   58,460x = 8,177,223,184
5. Step 5: Solve for x
   x = 8,177,223,184/58,460
6. Step 6: Final answer
   x = 139,877.24