Finding the Fourth Proportional to 1,038,760.12, 1,423,094.72 and 999,915.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038,760.12 : 1,423,094.72 = 999,915.39 : x
2. Step 2: Convert to fraction form
   1,038,760.12/1,423,094.72 = 999,915.39/x
3. Step 3: Cross multiply
   1,038,760.12x = 1,423,094.72 × 999,915.39
4. Step 4: Simplify right side
   1,038,760.12x = 1,422,974,311,955.74
5. Step 5: Solve for x
   x = 1,422,974,311,955.74/1,038,760.12
6. Step 6: Final answer
   x = 1,369,877.69