Finding the Fourth Proportional to 28,007,578.58, 42,012,681.14 and 13,613,488.34

Step by Step Solution

1. Step 1: Write the proportion equation
   28,007,578.58 : 42,012,681.14 = 13,613,488.34 : x
2. Step 2: Convert to fraction form
   28,007,578.58/42,012,681.14 = 13,613,488.34/x
3. Step 3: Cross multiply
   28,007,578.58x = 42,012,681.14 × 13,613,488.34
4. Step 4: Simplify right side
   28,007,578.58x = 571,939,144,655,498.25
5. Step 5: Solve for x
   x = 571,939,144,655,498.25/28,007,578.58
6. Step 6: Final answer
   x = 20,420,870.84