Finding the Third Proportional to 28,641.80 and 42,085.87

Step by Step Solution

1. Step 1: Write the proportion equation
   28,641.80 : 42,085.87 = 42,085.87 : x
2. Step 2: Convert to fraction form
   28,641.80/42,085.87 = 42,085.87/x
3. Step 3: Cross multiply
   28,641.80x = 42,085.87 × 42,085.87
4. Step 4: Simplify right side
   28,641.80x = 1,771,220,258.02
5. Step 5: Solve for x
   x = 1,771,220,258.02/28,641.80
6. Step 6: Final answer
   x = 61,840.39