Finding the Fourth Proportional to 102,071.84, 140,856.32 and 56,748.64

Step by Step Solution

1. Step 1: Write the proportion equation
   102,071.84 : 140,856.32 = 56,748.64 : x
2. Step 2: Convert to fraction form
   102,071.84/140,856.32 = 56,748.64/x
3. Step 3: Cross multiply
   102,071.84x = 140,856.32 × 56,748.64
4. Step 4: Simplify right side
   102,071.84x = 7,993,404,595.40
5. Step 5: Solve for x
   x = 7,993,404,595.40/102,071.84
6. Step 6: Final answer
   x = 78,311.56