Finding the Fourth Proportional to 307,312, 424,090.56 and 166,000

Step by Step Solution

1. Step 1: Write the proportion equation
   307,312 : 424,090.56 = 166,000 : x
2. Step 2: Convert to fraction form
   307,312/424,090.56 = 166,000/x
3. Step 3: Cross multiply
   307,312x = 424,090.56 × 166,000
4. Step 4: Simplify right side
   307,312x = 70,399,032,960
5. Step 5: Solve for x
   x = 70,399,032,960/307,312
6. Step 6: Final answer
   x = 229,080