Finding the Fourth Proportional to 55,612.94, 76,780.69 and 42,842.07

Step by Step Solution

1. Step 1: Write the proportion equation
   55,612.94 : 76,780.69 = 42,842.07 : x
2. Step 2: Convert to fraction form
   55,612.94/76,780.69 = 42,842.07/x
3. Step 3: Cross multiply
   55,612.94x = 76,780.69 × 42,842.07
4. Step 4: Simplify right side
   55,612.94x = 3,289,443,588.52
5. Step 5: Solve for x
   x = 3,289,443,588.52/55,612.94
6. Step 6: Final answer
   x = 59,148.89