Finding the Fourth Proportional to 1,096,111.62, 1,512,633.48 and 643,402.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096,111.62 : 1,512,633.48 = 643,402.62 : x
2. Step 2: Convert to fraction form
   1,096,111.62/1,512,633.48 = 643,402.62/x
3. Step 3: Cross multiply
   1,096,111.62x = 1,512,633.48 × 643,402.62
4. Step 4: Simplify right side
   1,096,111.62x = 973,232,344,131.72
5. Step 5: Solve for x
   x = 973,232,344,131.72/1,096,111.62
6. Step 6: Final answer
   x = 887,895.29