Finding the Fourth Proportional to 76,130.14, 105,056.90 and 42,138.69

Step by Step Solution

1. Step 1: Write the proportion equation
   76,130.14 : 105,056.90 = 42,138.69 : x
2. Step 2: Convert to fraction form
   76,130.14/105,056.90 = 42,138.69/x
3. Step 3: Cross multiply
   76,130.14x = 105,056.90 × 42,138.69
4. Step 4: Simplify right side
   76,130.14x = 4,426,960,141.46
5. Step 5: Solve for x
   x = 4,426,960,141.46/76,130.14
6. Step 6: Final answer
   x = 58,149.90