Finding the Fourth Proportional to 78,345.09, 108,115.61 and 42,534.38

Step by Step Solution

1. Step 1: Write the proportion equation
   78,345.09 : 108,115.61 = 42,534.38 : x
2. Step 2: Convert to fraction form
   78,345.09/108,115.61 = 42,534.38/x
3. Step 3: Cross multiply
   78,345.09x = 108,115.61 × 42,534.38
4. Step 4: Simplify right side
   78,345.09x = 4,598,629,686.42
5. Step 5: Solve for x
   x = 4,598,629,686.42/78,345.09
6. Step 6: Final answer
   x = 58,697.10