Finding the Fourth Proportional to 19,506,516.15, 29,238,654.89 and 12,687,962.07

Step by Step Solution

1. Step 1: Write the proportion equation
   19,506,516.15 : 29,238,654.89 = 12,687,962.07 : x
2. Step 2: Convert to fraction form
   19,506,516.15/29,238,654.89 = 12,687,962.07/x
3. Step 3: Cross multiply
   19,506,516.15x = 29,238,654.89 × 12,687,962.07
4. Step 4: Simplify right side
   19,506,516.15x = 370,978,944,049,055.31
5. Step 5: Solve for x
   x = 370,978,944,049,055.31/19,506,516.15
6. Step 6: Final answer
   x = 19,018,206.08