Finding the Third Proportional to 42,298.50 and 90,429

Step by Step Solution

1. Step 1: Write the proportion equation
   42,298.50 : 90,429 = 90,429 : x
2. Step 2: Convert to fraction form
   42,298.50/90,429 = 90,429/x
3. Step 3: Cross multiply
   42,298.50x = 90,429 × 90,429
4. Step 4: Simplify right side
   42,298.50x = 8,177,404,041
5. Step 5: Solve for x
   x = 8,177,404,041/42,298.50
6. Step 6: Final answer
   x = 193,326.10