Finding the Fourth Proportional to 62,631.90, 86,381.76 and 55,062.12

Step by Step Solution

1. Step 1: Write the proportion equation
   62,631.90 : 86,381.76 = 55,062.12 : x
2. Step 2: Convert to fraction form
   62,631.90/86,381.76 = 55,062.12/x
3. Step 3: Cross multiply
   62,631.90x = 86,381.76 × 55,062.12
4. Step 4: Simplify right side
   62,631.90x = 4,756,362,834.93
5. Step 5: Solve for x
   x = 4,756,362,834.93/62,631.90
6. Step 6: Final answer
   x = 75,941.54