Finding the Fourth Proportional to 76,505.13, 105,578.18 and 42,053.05

Step by Step Solution

1. Step 1: Write the proportion equation
   76,505.13 : 105,578.18 = 42,053.05 : x
2. Step 2: Convert to fraction form
   76,505.13/105,578.18 = 42,053.05/x
3. Step 3: Cross multiply
   76,505.13x = 105,578.18 × 42,053.05
4. Step 4: Simplify right side
   76,505.13x = 4,439,884,641.26
5. Step 5: Solve for x
   x = 4,439,884,641.26/76,505.13
6. Step 6: Final answer
   x = 58,033.82