Finding the Fourth Proportional to 1,261,111.20, 1,739,878.54 and 970,811.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,261,111.20 : 1,739,878.54 = 970,811.52 : x
2. Step 2: Convert to fraction form
   1,261,111.20/1,739,878.54 = 970,811.52/x
3. Step 3: Cross multiply
   1,261,111.20x = 1,739,878.54 × 970,811.52
4. Step 4: Simplify right side
   1,261,111.20x = 1,689,094,130,032.78
5. Step 5: Solve for x
   x = 1,689,094,130,032.78/1,261,111.20
6. Step 6: Final answer
   x = 1,339,369.70