Finding the Fourth Proportional to 139,352, 209,062.72 and 40,856

Step by Step Solution

1. Step 1: Write the proportion equation
   139,352 : 209,062.72 = 40,856 : x
2. Step 2: Convert to fraction form
   139,352/209,062.72 = 40,856/x
3. Step 3: Cross multiply
   139,352x = 209,062.72 × 40,856
4. Step 4: Simplify right side
   139,352x = 8,541,466,488.32
5. Step 5: Solve for x
   x = 8,541,466,488.32/139,352
6. Step 6: Final answer
   x = 61,294.18