Finding the Fourth Proportional to 9,872,870.90, 13,619,078.37 and 5,742,437.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,872,870.90 : 13,619,078.37 = 5,742,437.09 : x
2. Step 2: Convert to fraction form
   9,872,870.90/13,619,078.37 = 5,742,437.09/x
3. Step 3: Cross multiply
   9,872,870.90x = 13,619,078.37 × 5,742,437.09
4. Step 4: Simplify right side
   9,872,870.90x = 78,206,700,695,409.34
5. Step 5: Solve for x
   x = 78,206,700,695,409.34/9,872,870.90
6. Step 6: Final answer
   x = 7,921,373.79