Finding the Fourth Proportional to 647,111.70, 893,017.11 and 375,340.50

Step by Step Solution

1. Step 1: Write the proportion equation
   647,111.70 : 893,017.11 = 375,340.50 : x
2. Step 2: Convert to fraction form
   647,111.70/893,017.11 = 375,340.50/x
3. Step 3: Cross multiply
   647,111.70x = 893,017.11 × 375,340.50
4. Step 4: Simplify right side
   647,111.70x = 335,185,488,575.96
5. Step 5: Solve for x
   x = 335,185,488,575.96/647,111.70
6. Step 6: Final answer
   x = 517,971.61