Finding the Fourth Proportional to 139,429.80, 191,967.30 and 118,175.40

Step by Step Solution

1. Step 1: Write the proportion equation
   139,429.80 : 191,967.30 = 118,175.40 : x
2. Step 2: Convert to fraction form
   139,429.80/191,967.30 = 118,175.40/x
3. Step 3: Cross multiply
   139,429.80x = 191,967.30 × 118,175.40
4. Step 4: Simplify right side
   139,429.80x = 22,685,812,464.42
5. Step 5: Solve for x
   x = 22,685,812,464.42/139,429.80
6. Step 6: Final answer
   x = 162,704.19