Finding the Fourth Proportional to 78,998.08, 109,019.40 and 47,185.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,998.08 : 109,019.40 = 47,185.30 : x
2. Step 2: Convert to fraction form
   78,998.08/109,019.40 = 47,185.30/x
3. Step 3: Cross multiply
   78,998.08x = 109,019.40 × 47,185.30
4. Step 4: Simplify right side
   78,998.08x = 5,144,113,094.82
5. Step 5: Solve for x
   x = 5,144,113,094.82/78,998.08
6. Step 6: Final answer
   x = 65,116.94