Finding the Fourth Proportional to 139,985.76, 209,978.80 and 34,804.74

Step by Step Solution

1. Step 1: Write the proportion equation
   139,985.76 : 209,978.80 = 34,804.74 : x
2. Step 2: Convert to fraction form
   139,985.76/209,978.80 = 34,804.74/x
3. Step 3: Cross multiply
   139,985.76x = 209,978.80 × 34,804.74
4. Step 4: Simplify right side
   139,985.76x = 7,308,257,452.50
5. Step 5: Solve for x
   x = 7,308,257,452.50/139,985.76
6. Step 6: Final answer
   x = 52,207.15