Finding the Fourth Proportional to 78,566.13, 108,421.59 and 42,756.09

Step by Step Solution

1. Step 1: Write the proportion equation
   78,566.13 : 108,421.59 = 42,756.09 : x
2. Step 2: Convert to fraction form
   78,566.13/108,421.59 = 42,756.09/x
3. Step 3: Cross multiply
   78,566.13x = 108,421.59 × 42,756.09
4. Step 4: Simplify right side
   78,566.13x = 4,635,683,259.98
5. Step 5: Solve for x
   x = 4,635,683,259.98/78,566.13
6. Step 6: Final answer
   x = 59,003.58