Finding the Fourth Proportional to 78,558.90, 108,412.29 and 42,749.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,558.90 : 108,412.29 = 42,749.88 : x
2. Step 2: Convert to fraction form
   78,558.90/108,412.29 = 42,749.88/x
3. Step 3: Cross multiply
   78,558.90x = 108,412.29 × 42,749.88
4. Step 4: Simplify right side
   78,558.90x = 4,634,612,388.03
5. Step 5: Solve for x
   x = 4,634,612,388.03/78,558.90
6. Step 6: Final answer
   x = 58,995.38