Finding the Fourth Proportional to 19,506,510.63, 29,238,646.59 and 12,687,956.55

Step by Step Solution

1. Step 1: Write the proportion equation
   19,506,510.63 : 29,238,646.59 = 12,687,956.55 : x
2. Step 2: Convert to fraction form
   19,506,510.63/29,238,646.59 = 12,687,956.55/x
3. Step 3: Cross multiply
   19,506,510.63x = 29,238,646.59 × 12,687,956.55
4. Step 4: Simplify right side
   19,506,510.63x = 370,978,677,514,725.69
5. Step 5: Solve for x
   x = 370,978,677,514,725.69/19,506,510.63
6. Step 6: Final answer
   x = 19,018,197.80