Finding the Fourth Proportional to 30,513,111.50, 42,119,143.28 and 20,203,156.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,513,111.50 : 42,119,143.28 = 20,203,156.10 : x
2. Step 2: Convert to fraction form
   30,513,111.50/42,119,143.28 = 20,203,156.10/x
3. Step 3: Cross multiply
   30,513,111.50x = 42,119,143.28 × 20,203,156.10
4. Step 4: Simplify right side
   30,513,111.50x = 850,939,626,172,494.38
5. Step 5: Solve for x
   x = 850,939,626,172,494.38/30,513,111.50
6. Step 6: Final answer
   x = 27,887,671.38