Finding the Fourth Proportional to 100,003.04, 138,016.89 and 56,997.99

Step by Step Solution

1. Step 1: Write the proportion equation
   100,003.04 : 138,016.89 = 56,997.99 : x
2. Step 2: Convert to fraction form
   100,003.04/138,016.89 = 56,997.99/x
3. Step 3: Cross multiply
   100,003.04x = 138,016.89 × 56,997.99
4. Step 4: Simplify right side
   100,003.04x = 7,866,685,529.79
5. Step 5: Solve for x
   x = 7,866,685,529.79/100,003.04
6. Step 6: Final answer
   x = 78,664.46