Finding the Fourth Proportional to 1,245,042.72, 1,868,147.34 and 613,612.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,245,042.72 : 1,868,147.34 = 613,612.08 : x
2. Step 2: Convert to fraction form
   1,245,042.72/1,868,147.34 = 613,612.08/x
3. Step 3: Cross multiply
   1,245,042.72x = 1,868,147.34 × 613,612.08
4. Step 4: Simplify right side
   1,245,042.72x = 1,146,317,775,043.87
5. Step 5: Solve for x
   x = 1,146,317,775,043.87/1,245,042.72
6. Step 6: Final answer
   x = 920,705.58