Finding the Fourth Proportional to 78,619.01, 108,493.70 and 42,809.00

Step by Step Solution

1. Step 1: Write the proportion equation
   78,619.01 : 108,493.70 = 42,809.00 : x
2. Step 2: Convert to fraction form
   78,619.01/108,493.70 = 42,809.00/x
3. Step 3: Cross multiply
   78,619.01x = 108,493.70 × 42,809.00
4. Step 4: Simplify right side
   78,619.01x = 4,644,506,046.79
5. Step 5: Solve for x
   x = 4,644,506,046.79/78,619.01
6. Step 6: Final answer
   x = 59,076.12