Finding the Fourth Proportional to 1,141,838.60, 1,575,743.27 and 645,124.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141,838.60 : 1,575,743.27 = 645,124.73 : x
2. Step 2: Convert to fraction form
   1,141,838.60/1,575,743.27 = 645,124.73/x
3. Step 3: Cross multiply
   1,141,838.60x = 1,575,743.27 × 645,124.73
4. Step 4: Simplify right side
   1,141,838.60x = 1,016,550,940,503.73
5. Step 5: Solve for x
   x = 1,016,550,940,503.73/1,141,838.60
6. Step 6: Final answer
   x = 890,275.51