Finding the Fourth Proportional to 1,609,111.50, 2,220,191.03 and 911,398.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,609,111.50 : 2,220,191.03 = 911,398.35 : x
2. Step 2: Convert to fraction form
   1,609,111.50/2,220,191.03 = 911,398.35/x
3. Step 3: Cross multiply
   1,609,111.50x = 2,220,191.03 × 911,398.35
4. Step 4: Simplify right side
   1,609,111.50x = 2,023,478,441,426.80
5. Step 5: Solve for x
   x = 2,023,478,441,426.80/1,609,111.50
6. Step 6: Final answer
   x = 1,257,512.88