Finding the Fourth Proportional to 70,663.06, 105,994.34 and 67,115.47

Step by Step Solution

1. Step 1: Write the proportion equation
   70,663.06 : 105,994.34 = 67,115.47 : x
2. Step 2: Convert to fraction form
   70,663.06/105,994.34 = 67,115.47/x
3. Step 3: Cross multiply
   70,663.06x = 105,994.34 × 67,115.47
4. Step 4: Simplify right side
   70,663.06x = 7,113,859,080.89
5. Step 5: Solve for x
   x = 7,113,859,080.89/70,663.06
6. Step 6: Final answer
   x = 100,672.96