Finding the Fourth Proportional to 76,143, 105,076.02 and 42,150.74

Step by Step Solution

1. Step 1: Write the proportion equation
   76,143 : 105,076.02 = 42,150.74 : x
2. Step 2: Convert to fraction form
   76,143/105,076.02 = 42,150.74/x
3. Step 3: Cross multiply
   76,143x = 105,076.02 × 42,150.74
4. Step 4: Simplify right side
   76,143x = 4,429,031,999.25
5. Step 5: Solve for x
   x = 4,429,031,999.25/76,143
6. Step 6: Final answer
   x = 58,167.29