Finding the Fourth Proportional to 23,130,145.89, 31,919,601.35 and 12,816,869.02

Step by Step Solution

1. Step 1: Write the proportion equation
   23,130,145.89 : 31,919,601.35 = 12,816,869.02 : x
2. Step 2: Convert to fraction form
   23,130,145.89/31,919,601.35 = 12,816,869.02/x
3. Step 3: Cross multiply
   23,130,145.89x = 31,919,601.35 × 12,816,869.02
4. Step 4: Simplify right side
   23,130,145.89x = 409,109,349,625,808.31
5. Step 5: Solve for x
   x = 409,109,349,625,808.31/23,130,145.89
6. Step 6: Final answer
   x = 17,687,279.26