Finding the Third Proportional to 42,139.88 and 90,276.94

Step by Step Solution

1. Step 1: Write the proportion equation
   42,139.88 : 90,276.94 = 90,276.94 : x
2. Step 2: Convert to fraction form
   42,139.88/90,276.94 = 90,276.94/x
3. Step 3: Cross multiply
   42,139.88x = 90,276.94 × 90,276.94
4. Step 4: Simplify right side
   42,139.88x = 8,149,925,444.38
5. Step 5: Solve for x
   x = 8,149,925,444.38/42,139.88
6. Step 6: Final answer
   x = 193,401.75