Finding the Fourth Proportional to 76,120.53, 105,047.64 and 42,131.82

Step by Step Solution

1. Step 1: Write the proportion equation
   76,120.53 : 105,047.64 = 42,131.82 : x
2. Step 2: Convert to fraction form
   76,120.53/105,047.64 = 42,131.82/x
3. Step 3: Cross multiply
   76,120.53x = 105,047.64 × 42,131.82
4. Step 4: Simplify right side
   76,120.53x = 4,425,848,259.90
5. Step 5: Solve for x
   x = 4,425,848,259.90/76,120.53
6. Step 6: Final answer
   x = 58,142.64