Finding the Fourth Proportional to 78,031.96, 107,683.83 and 42,221.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,031.96 : 107,683.83 = 42,221.81 : x
2. Step 2: Convert to fraction form
   78,031.96/107,683.83 = 42,221.81/x
3. Step 3: Cross multiply
   78,031.96x = 107,683.83 × 42,221.81
4. Step 4: Simplify right side
   78,031.96x = 4,546,606,210.33
5. Step 5: Solve for x
   x = 4,546,606,210.33/78,031.96
6. Step 6: Final answer
   x = 58,265.95