Finding the Third Proportional to 42,930 and 56,587

Step by Step Solution

1. Step 1: Write the proportion equation
   42,930 : 56,587 = 56,587 : x
2. Step 2: Convert to fraction form
   42,930/56,587 = 56,587/x
3. Step 3: Cross multiply
   42,930x = 56,587 × 56,587
4. Step 4: Simplify right side
   42,930x = 3,202,088,569
5. Step 5: Solve for x
   x = 3,202,088,569/42,930
6. Step 6: Final answer
   x = 74,588.60