Finding the Fourth Proportional to 467,978.79, 645,808.61 and 253,118.34

Step by Step Solution

1. Step 1: Write the proportion equation
   467,978.79 : 645,808.61 = 253,118.34 : x
2. Step 2: Convert to fraction form
   467,978.79/645,808.61 = 253,118.34/x
3. Step 3: Cross multiply
   467,978.79x = 645,808.61 × 253,118.34
4. Step 4: Simplify right side
   467,978.79x = 163,466,003,953.70
5. Step 5: Solve for x
   x = 163,466,003,953.70/467,978.79
6. Step 6: Final answer
   x = 349,302.17