Finding the Fourth Proportional to 760,219.88, 1,139,419.76 and 354,866.72

Step by Step Solution

1. Step 1: Write the proportion equation
   760,219.88 : 1,139,419.76 = 354,866.72 : x
2. Step 2: Convert to fraction form
   760,219.88/1,139,419.76 = 354,866.72/x
3. Step 3: Cross multiply
   760,219.88x = 1,139,419.76 × 354,866.72
4. Step 4: Simplify right side
   760,219.88x = 404,342,145,462.96
5. Step 5: Solve for x
   x = 404,342,145,462.96/760,219.88
6. Step 6: Final answer
   x = 531,875.26