Finding the Fourth Proportional to 1,199,128.66, 1,653,653.88 and 785,047.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,199,128.66 : 1,653,653.88 = 785,047.55 : x
2. Step 2: Convert to fraction form
   1,199,128.66/1,653,653.88 = 785,047.55/x
3. Step 3: Cross multiply
   1,199,128.66x = 1,653,653.88 × 785,047.55
4. Step 4: Simplify right side
   1,199,128.66x = 1,298,196,918,773.72
5. Step 5: Solve for x
   x = 1,298,196,918,773.72/1,199,128.66
6. Step 6: Final answer
   x = 1,082,616.87