Finding the Fourth Proportional to 119,034.42, 164,274.78 and 78,678.21

Step by Step Solution

1. Step 1: Write the proportion equation
   119,034.42 : 164,274.78 = 78,678.21 : x
2. Step 2: Convert to fraction form
   119,034.42/164,274.78 = 78,678.21/x
3. Step 3: Cross multiply
   119,034.42x = 164,274.78 × 78,678.21
4. Step 4: Simplify right side
   119,034.42x = 12,924,845,638.54
5. Step 5: Solve for x
   x = 12,924,845,638.54/119,034.42
6. Step 6: Final answer
   x = 108,580.74