Finding the Fourth Proportional to 76,790.95, 105,972.57 and 42,798.49

Step by Step Solution

1. Step 1: Write the proportion equation
   76,790.95 : 105,972.57 = 42,798.49 : x
2. Step 2: Convert to fraction form
   76,790.95/105,972.57 = 42,798.49/x
3. Step 3: Cross multiply
   76,790.95x = 105,972.57 × 42,798.49
4. Step 4: Simplify right side
   76,790.95x = 4,535,465,233.56
5. Step 5: Solve for x
   x = 4,535,465,233.56/76,790.95
6. Step 6: Final answer
   x = 59,062.50