Finding the Fourth Proportional to 28,527,516.42, 42,811,705.55 and 12,144,287.18

Step by Step Solution

1. Step 1: Write the proportion equation
   28,527,516.42 : 42,811,705.55 = 12,144,287.18 : x
2. Step 2: Convert to fraction form
   28,527,516.42/42,811,705.55 = 12,144,287.18/x
3. Step 3: Cross multiply
   28,527,516.42x = 42,811,705.55 × 12,144,287.18
4. Step 4: Simplify right side
   28,527,516.42x = 519,917,646,590,019.94
5. Step 5: Solve for x
   x = 519,917,646,590,019.94/28,527,516.42
6. Step 6: Final answer
   x = 18,225,128.29