Finding the Fourth Proportional to 139,804.99, 209,627.52 and 64,886.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,804.99 : 209,627.52 = 64,886.56 : x
2. Step 2: Convert to fraction form
   139,804.99/209,627.52 = 64,886.56/x
3. Step 3: Cross multiply
   139,804.99x = 209,627.52 × 64,886.56
4. Step 4: Simplify right side
   139,804.99x = 13,602,008,654.13
5. Step 5: Solve for x
   x = 13,602,008,654.13/139,804.99
6. Step 6: Final answer
   x = 97,292.73