Finding the Fourth Proportional to 77,021.57, 106,287.69 and 42,094.84

Step by Step Solution

1. Step 1: Write the proportion equation
   77,021.57 : 106,287.69 = 42,094.84 : x
2. Step 2: Convert to fraction form
   77,021.57/106,287.69 = 42,094.84/x
3. Step 3: Cross multiply
   77,021.57x = 106,287.69 × 42,094.84
4. Step 4: Simplify right side
   77,021.57x = 4,474,163,304.52
5. Step 5: Solve for x
   x = 4,474,163,304.52/77,021.57
6. Step 6: Final answer
   x = 58,089.74