Finding the Fourth Proportional to 76,749.61, 105,917.74 and 42,758.08

Step by Step Solution

1. Step 1: Write the proportion equation
   76,749.61 : 105,917.74 = 42,758.08 : x
2. Step 2: Convert to fraction form
   76,749.61/105,917.74 = 42,758.08/x
3. Step 3: Cross multiply
   76,749.61x = 105,917.74 × 42,758.08
4. Step 4: Simplify right side
   76,749.61x = 4,528,838,986.55
5. Step 5: Solve for x
   x = 4,528,838,986.55/76,749.61
6. Step 6: Final answer
   x = 59,007.97