Finding the Fourth Proportional to 308,564.52, 462,680.34 and 139,992.84

Step by Step Solution

1. Step 1: Write the proportion equation
   308,564.52 : 462,680.34 = 139,992.84 : x
2. Step 2: Convert to fraction form
   308,564.52/462,680.34 = 139,992.84/x
3. Step 3: Cross multiply
   308,564.52x = 462,680.34 × 139,992.84
4. Step 4: Simplify right side
   308,564.52x = 64,771,934,808.77
5. Step 5: Solve for x
   x = 64,771,934,808.77/308,564.52
6. Step 6: Final answer
   x = 209,913.75