Finding the Fourth Proportional to 72,980.69, 100,714.47 and 42,758.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,980.69 : 100,714.47 = 42,758.78 : x
2. Step 2: Convert to fraction form
   72,980.69/100,714.47 = 42,758.78/x
3. Step 3: Cross multiply
   72,980.69x = 100,714.47 × 42,758.78
4. Step 4: Simplify right side
   72,980.69x = 4,306,427,865.55
5. Step 5: Solve for x
   x = 4,306,427,865.55/72,980.69
6. Step 6: Final answer
   x = 59,007.77