Finding the Fourth Proportional to 142,970.30, 214,456.98 and 43,131.35

Step by Step Solution

1. Step 1: Write the proportion equation
   142,970.30 : 214,456.98 = 43,131.35 : x
2. Step 2: Convert to fraction form
   142,970.30/214,456.98 = 43,131.35/x
3. Step 3: Cross multiply
   142,970.30x = 214,456.98 × 43,131.35
4. Step 4: Simplify right side
   142,970.30x = 9,249,818,848.67
5. Step 5: Solve for x
   x = 9,249,818,848.67/142,970.30
6. Step 6: Final answer
   x = 64,697.49