Finding the Fourth Proportional to 2,208,898.72, 3,312,978.96 and 611,623.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,208,898.72 : 3,312,978.96 = 611,623.26 : x
2. Step 2: Convert to fraction form
   2,208,898.72/3,312,978.96 = 611,623.26/x
3. Step 3: Cross multiply
   2,208,898.72x = 3,312,978.96 × 611,623.26
4. Step 4: Simplify right side
   2,208,898.72x = 2,026,294,991,826.61
5. Step 5: Solve for x
   x = 2,026,294,991,826.61/2,208,898.72
6. Step 6: Final answer
   x = 917,332.68