Finding the Fourth Proportional to 28,074,259.42, 42,105,022.88 and 12,711,407.28

Step by Step Solution

1. Step 1: Write the proportion equation
   28,074,259.42 : 42,105,022.88 = 12,711,407.28 : x
2. Step 2: Convert to fraction form
   28,074,259.42/42,105,022.88 = 12,711,407.28/x
3. Step 3: Cross multiply
   28,074,259.42x = 42,105,022.88 × 12,711,407.28
4. Step 4: Simplify right side
   28,074,259.42x = 535,214,094,139,947.69
5. Step 5: Solve for x
   x = 535,214,094,139,947.69/28,074,259.42
6. Step 6: Final answer
   x = 19,064,228.42