Finding the Fourth Proportional to 78,279.71, 108,026.22 and 42,470.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78,279.71 : 108,026.22 = 42,470.01 : x
2. Step 2: Convert to fraction form
   78,279.71/108,026.22 = 42,470.01/x
3. Step 3: Cross multiply
   78,279.71x = 108,026.22 × 42,470.01
4. Step 4: Simplify right side
   78,279.71x = 4,587,874,643.66
5. Step 5: Solve for x
   x = 4,587,874,643.66/78,279.71
6. Step 6: Final answer
   x = 58,608.74