Finding the Fourth Proportional to 138,300.41, 207,118.01 and 78,956.17

Step by Step Solution

1. Step 1: Write the proportion equation
   138,300.41 : 207,118.01 = 78,956.17 : x
2. Step 2: Convert to fraction form
   138,300.41/207,118.01 = 78,956.17/x
3. Step 3: Cross multiply
   138,300.41x = 207,118.01 × 78,956.17
4. Step 4: Simplify right side
   138,300.41x = 16,353,244,487.22
5. Step 5: Solve for x
   x = 16,353,244,487.22/138,300.41
6. Step 6: Final answer
   x = 118,244.37