Finding the Fourth Proportional to 72,980.19, 100,713.78 and 42,758.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,980.19 : 100,713.78 = 42,758.28 : x
2. Step 2: Convert to fraction form
   72,980.19/100,713.78 = 42,758.28/x
3. Step 3: Cross multiply
   72,980.19x = 100,713.78 × 42,758.28
4. Step 4: Simplify right side
   72,980.19x = 4,306,348,005.10
5. Step 5: Solve for x
   x = 4,306,348,005.10/72,980.19
6. Step 6: Final answer
   x = 59,007.08