Finding the Fourth Proportional to 62,640, 86,483.52 and 55,914.12

Step by Step Solution

1. Step 1: Write the proportion equation
   62,640 : 86,483.52 = 55,914.12 : x
2. Step 2: Convert to fraction form
   62,640/86,483.52 = 55,914.12/x
3. Step 3: Cross multiply
   62,640x = 86,483.52 × 55,914.12
4. Step 4: Simplify right side
   62,640x = 4,835,649,915.30
5. Step 5: Solve for x
   x = 4,835,649,915.30/62,640
6. Step 6: Final answer
   x = 77,197.48