Finding the Fourth Proportional to 139,985.89, 209,978.99 and 34,804.87

Step by Step Solution

1. Step 1: Write the proportion equation
   139,985.89 : 209,978.99 = 34,804.87 : x
2. Step 2: Convert to fraction form
   139,985.89/209,978.99 = 34,804.87/x
3. Step 3: Cross multiply
   139,985.89x = 209,978.99 × 34,804.87
4. Step 4: Simplify right side
   139,985.89x = 7,308,291,449.68
5. Step 5: Solve for x
   x = 7,308,291,449.68/139,985.89
6. Step 6: Final answer
   x = 52,207.34