Finding the Fourth Proportional to 76,131.51, 105,060.02 and 42,140.03

Step by Step Solution

1. Step 1: Write the proportion equation
   76,131.51 : 105,060.02 = 42,140.03 : x
2. Step 2: Convert to fraction form
   76,131.51/105,060.02 = 42,140.03/x
3. Step 3: Cross multiply
   76,131.51x = 105,060.02 × 42,140.03
4. Step 4: Simplify right side
   76,131.51x = 4,427,231,658.60
5. Step 5: Solve for x
   x = 4,427,231,658.60/76,131.51
6. Step 6: Final answer
   x = 58,152.42