Finding the Fourth Proportional to 76,137.54, 105,070.72 and 42,149.16

Step by Step Solution

1. Step 1: Write the proportion equation
   76,137.54 : 105,070.72 = 42,149.16 : x
2. Step 2: Convert to fraction form
   76,137.54/105,070.72 = 42,149.16/x
3. Step 3: Cross multiply
   76,137.54x = 105,070.72 × 42,149.16
4. Step 4: Simplify right side
   76,137.54x = 4,428,642,588.60
5. Step 5: Solve for x
   x = 4,428,642,588.60/76,137.54
6. Step 6: Final answer
   x = 58,166.35