Finding the Fourth Proportional to 72,990.31, 100,726.70 and 42,769.62

Step by Step Solution

1. Step 1: Write the proportion equation
   72,990.31 : 100,726.70 = 42,769.62 : x
2. Step 2: Convert to fraction form
   72,990.31/100,726.70 = 42,769.62/x
3. Step 3: Cross multiply
   72,990.31x = 100,726.70 × 42,769.62
4. Step 4: Simplify right side
   72,990.31x = 4,308,042,682.85
5. Step 5: Solve for x
   x = 4,308,042,682.85/72,990.31
6. Step 6: Final answer
   x = 59,022.12