Finding the Fourth Proportional to 139,897.32, 209,897.82 and 65,057.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,897.32 : 209,897.82 = 65,057.64 : x
2. Step 2: Convert to fraction form
   139,897.32/209,897.82 = 65,057.64/x
3. Step 3: Cross multiply
   139,897.32x = 209,897.82 × 65,057.64
4. Step 4: Simplify right side
   139,897.32x = 13,655,456,810.34
5. Step 5: Solve for x
   x = 13,655,456,810.34/139,897.32
6. Step 6: Final answer
   x = 97,610.57