Finding the Fourth Proportional to 12,139,084.71, 18,217,615.59 and 5,749,356.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139,084.71 : 18,217,615.59 = 5,749,356.87 : x
2. Step 2: Convert to fraction form
   12,139,084.71/18,217,615.59 = 5,749,356.87/x
3. Step 3: Cross multiply
   12,139,084.71x = 18,217,615.59 × 5,749,356.87
4. Step 4: Simplify right side
   12,139,084.71x = 104,739,573,347,385.61
5. Step 5: Solve for x
   x = 104,739,573,347,385.61/12,139,084.71
6. Step 6: Final answer
   x = 8,628,292.48