Finding the Fourth Proportional to 105,421.50, 158,094.18 and 42,256.08

Step by Step Solution

1. Step 1: Write the proportion equation
   105,421.50 : 158,094.18 = 42,256.08 : x
2. Step 2: Convert to fraction form
   105,421.50/158,094.18 = 42,256.08/x
3. Step 3: Cross multiply
   105,421.50x = 158,094.18 × 42,256.08
4. Step 4: Simplify right side
   105,421.50x = 6,680,440,317.61
5. Step 5: Solve for x
   x = 6,680,440,317.61/105,421.50
6. Step 6: Final answer
   x = 63,368.86