Finding the Fourth Proportional to 617,412.72, 852,161.94 and 402,168.72

Step by Step Solution

1. Step 1: Write the proportion equation
   617,412.72 : 852,161.94 = 402,168.72 : x
2. Step 2: Convert to fraction form
   617,412.72/852,161.94 = 402,168.72/x
3. Step 3: Cross multiply
   617,412.72x = 852,161.94 × 402,168.72
4. Step 4: Simplify right side
   617,412.72x = 342,712,876,642.52
5. Step 5: Solve for x
   x = 342,712,876,642.52/617,412.72
6. Step 6: Final answer
   x = 555,079.07