Finding the Third Proportional to 42,122.53 and 90,156.80

Step by Step Solution

1. Step 1: Write the proportion equation
   42,122.53 : 90,156.80 = 90,156.80 : x
2. Step 2: Convert to fraction form
   42,122.53/90,156.80 = 90,156.80/x
3. Step 3: Cross multiply
   42,122.53x = 90,156.80 × 90,156.80
4. Step 4: Simplify right side
   42,122.53x = 8,128,248,022.76
5. Step 5: Solve for x
   x = 8,128,248,022.76/42,122.53
6. Step 6: Final answer
   x = 192,966.75