Finding the Fourth Proportional to 76,134.53, 105,064.16 and 42,143.02

Step by Step Solution

1. Step 1: Write the proportion equation
   76,134.53 : 105,064.16 = 42,143.02 : x
2. Step 2: Convert to fraction form
   76,134.53/105,064.16 = 42,143.02/x
3. Step 3: Cross multiply
   76,134.53x = 105,064.16 × 42,143.02
4. Step 4: Simplify right side
   76,134.53x = 4,427,720,522.79
5. Step 5: Solve for x
   x = 4,427,720,522.79/76,134.53
6. Step 6: Final answer
   x = 58,156.53