Finding the Fourth Proportional to 78,438.99, 108,245.76 and 42,629.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78,438.99 : 108,245.76 = 42,629.01 : x
2. Step 2: Convert to fraction form
   78,438.99/108,245.76 = 42,629.01/x
3. Step 3: Cross multiply
   78,438.99x = 108,245.76 × 42,629.01
4. Step 4: Simplify right side
   78,438.99x = 4,614,409,585.50
5. Step 5: Solve for x
   x = 4,614,409,585.50/78,438.99
6. Step 6: Final answer
   x = 58,828.01