Finding the Fourth Proportional to 142,670.96, 214,005.92 and 42,830.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,670.96 : 214,005.92 = 42,830.72 : x
2. Step 2: Convert to fraction form
   142,670.96/214,005.92 = 42,830.72/x
3. Step 3: Cross multiply
   142,670.96x = 214,005.92 × 42,830.72
4. Step 4: Simplify right side
   142,670.96x = 9,166,027,637.86
5. Step 5: Solve for x
   x = 9,166,027,637.86/142,670.96
6. Step 6: Final answer
   x = 64,245.92