Finding the Fourth Proportional to 1,380,582.63, 1,905,791.90 and 928,136.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380,582.63 : 1,905,791.90 = 928,136.07 : x
2. Step 2: Convert to fraction form
   1,380,582.63/1,905,791.90 = 928,136.07/x
3. Step 3: Cross multiply
   1,380,582.63x = 1,905,791.90 × 928,136.07
4. Step 4: Simplify right side
   1,380,582.63x = 1,768,834,199,663.15
5. Step 5: Solve for x
   x = 1,768,834,199,663.15/1,380,582.63
6. Step 6: Final answer
   x = 1,281,222.99