Finding the Fourth Proportional to 87,401.74, 120,549.88 and 64,741.69

Step by Step Solution

1. Step 1: Write the proportion equation
   87,401.74 : 120,549.88 = 64,741.69 : x
2. Step 2: Convert to fraction form
   87,401.74/120,549.88 = 64,741.69/x
3. Step 3: Cross multiply
   87,401.74x = 120,549.88 × 64,741.69
4. Step 4: Simplify right side
   87,401.74x = 7,804,602,960.50
5. Step 5: Solve for x
   x = 7,804,602,960.50/87,401.74
6. Step 6: Final answer
   x = 89,295.74