Finding the Fourth Proportional to 1,645,085.63, 2,270,280.15 and 919,931.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645,085.63 : 2,270,280.15 = 919,931.72 : x
2. Step 2: Convert to fraction form
   1,645,085.63/2,270,280.15 = 919,931.72/x
3. Step 3: Cross multiply
   1,645,085.63x = 2,270,280.15 × 919,931.72
4. Step 4: Simplify right side
   1,645,085.63x = 2,088,502,711,919.96
5. Step 5: Solve for x
   x = 2,088,502,711,919.96/1,645,085.63
6. Step 6: Final answer
   x = 1,269,540.42