Finding the Fourth Proportional to 139,528.50, 209,292.96 and 64,607.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,528.50 : 209,292.96 = 64,607.82 : x
2. Step 2: Convert to fraction form
   139,528.50/209,292.96 = 64,607.82/x
3. Step 3: Cross multiply
   139,528.50x = 209,292.96 × 64,607.82
4. Step 4: Simplify right side
   139,528.50x = 13,521,961,886.95
5. Step 5: Solve for x
   x = 13,521,961,886.95/139,528.50
6. Step 6: Final answer
   x = 96,911.83