Finding the Fourth Proportional to 139,587.84, 209,402.46 and 64,715.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,587.84 : 209,402.46 = 64,715.52 : x
2. Step 2: Convert to fraction form
   139,587.84/209,402.46 = 64,715.52/x
3. Step 3: Cross multiply
   139,587.84x = 209,402.46 × 64,715.52
4. Step 4: Simplify right side
   139,587.84x = 13,551,589,088.18
5. Step 5: Solve for x
   x = 13,551,589,088.18/139,587.84
6. Step 6: Final answer
   x = 97,082.88