Finding the Fourth Proportional to 78,448.86, 108,260.07 and 42,638.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,448.86 : 108,260.07 = 42,638.88 : x
2. Step 2: Convert to fraction form
   78,448.86/108,260.07 = 42,638.88/x
3. Step 3: Cross multiply
   78,448.86x = 108,260.07 × 42,638.88
4. Step 4: Simplify right side
   78,448.86x = 4,616,088,133.52
5. Step 5: Solve for x
   x = 4,616,088,133.52/78,448.86
6. Step 6: Final answer
   x = 58,842.00