Finding the Fourth Proportional to 76,590.09, 105,693.72 and 42,134.07

Step by Step Solution

1. Step 1: Write the proportion equation
   76,590.09 : 105,693.72 = 42,134.07 : x
2. Step 2: Convert to fraction form
   76,590.09/105,693.72 = 42,134.07/x
3. Step 3: Cross multiply
   76,590.09x = 105,693.72 × 42,134.07
4. Step 4: Simplify right side
   76,590.09x = 4,453,306,597.04
5. Step 5: Solve for x
   x = 4,453,306,597.04/76,590.09
6. Step 6: Final answer
   x = 58,144.68