Finding the Fourth Proportional to 78,326.19, 108,090.61 and 42,516.45

Step by Step Solution

1. Step 1: Write the proportion equation
   78,326.19 : 108,090.61 = 42,516.45 : x
2. Step 2: Convert to fraction form
   78,326.19/108,090.61 = 42,516.45/x
3. Step 3: Cross multiply
   78,326.19x = 108,090.61 × 42,516.45
4. Step 4: Simplify right side
   78,326.19x = 4,595,629,392.05
5. Step 5: Solve for x
   x = 4,595,629,392.05/78,326.19
6. Step 6: Final answer
   x = 58,672.96