Finding the Fourth Proportional to 282,806,640.47, 424,271,019.18 and 86,085,436.72

Step by Step Solution

1. Step 1: Write the proportion equation
   282,806,640.47 : 424,271,019.18 = 86,085,436.72 : x
2. Step 2: Convert to fraction form
   282,806,640.47/424,271,019.18 = 86,085,436.72/x
3. Step 3: Cross multiply
   282,806,640.47x = 424,271,019.18 × 86,085,436.72
4. Step 4: Simplify right side
   282,806,640.47x = 36,523,555,973,807,880
5. Step 5: Solve for x
   x = 36,523,555,973,807,880/282,806,640.47
6. Step 6: Final answer
   x = 129,146,741.08