Finding the Fourth Proportional to 9,139,833.21, 12,612,699.21 and 5,009,776.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139,833.21 : 12,612,699.21 = 5,009,776.05 : x
2. Step 2: Convert to fraction form
   9,139,833.21/12,612,699.21 = 5,009,776.05/x
3. Step 3: Cross multiply
   9,139,833.21x = 12,612,699.21 × 5,009,776.05
4. Step 4: Simplify right side
   9,139,833.21x = 63,186,798,428,111.92
5. Step 5: Solve for x
   x = 63,186,798,428,111.92/9,139,833.21
6. Step 6: Final answer
   x = 6,913,342.62