Finding the Fourth Proportional to 76,128.01, 105,053.98 and 42,136.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76,128.01 : 105,053.98 = 42,136.56 : x
2. Step 2: Convert to fraction form
   76,128.01/105,053.98 = 42,136.56/x
3. Step 3: Cross multiply
   76,128.01x = 105,053.98 × 42,136.56
4. Step 4: Simplify right side
   76,128.01x = 4,426,613,422.87
5. Step 5: Solve for x
   x = 4,426,613,422.87/76,128.01
6. Step 6: Final answer
   x = 58,146.97