Finding the Fourth Proportional to 76,123.32, 105,055.02 and 42,600.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,123.32 : 105,055.02 = 42,600.12 : x
2. Step 2: Convert to fraction form
   76,123.32/105,055.02 = 42,600.12/x
3. Step 3: Cross multiply
   76,123.32x = 105,055.02 × 42,600.12
4. Step 4: Simplify right side
   76,123.32x = 4,475,356,458.60
5. Step 5: Solve for x
   x = 4,475,356,458.60/76,123.32
6. Step 6: Final answer
   x = 58,790.87