Finding the Fourth Proportional to 1,289,643.05, 1,931,498.52 and 748,559.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,289,643.05 : 1,931,498.52 = 748,559.25 : x
2. Step 2: Convert to fraction form
   1,289,643.05/1,931,498.52 = 748,559.25/x
3. Step 3: Cross multiply
   1,289,643.05x = 1,931,498.52 × 748,559.25
4. Step 4: Simplify right side
   1,289,643.05x = 1,445,841,083,507.31
5. Step 5: Solve for x
   x = 1,445,841,083,507.31/1,289,643.05
6. Step 6: Final answer
   x = 1,121,117.27