Finding the Fourth Proportional to 76,119.06, 105,042.15 and 42,128.96

Step by Step Solution

1. Step 1: Write the proportion equation
   76,119.06 : 105,042.15 = 42,128.96 : x
2. Step 2: Convert to fraction form
   76,119.06/105,042.15 = 42,128.96/x
3. Step 3: Cross multiply
   76,119.06x = 105,042.15 × 42,128.96
4. Step 4: Simplify right side
   76,119.06x = 4,425,316,010.45
5. Step 5: Solve for x
   x = 4,425,316,010.45/76,119.06
6. Step 6: Final answer
   x = 58,136.77