Finding the Fourth Proportional to 99,300,426.95, 137,022,684.53 and 55,236,291.68

Step by Step Solution

1. Step 1: Write the proportion equation
   99,300,426.95 : 137,022,684.53 = 55,236,291.68 : x
2. Step 2: Convert to fraction form
   99,300,426.95/137,022,684.53 = 55,236,291.68/x
3. Step 3: Cross multiply
   99,300,426.95x = 137,022,684.53 × 55,236,291.68
4. Step 4: Simplify right side
   99,300,426.95x = 7,568,624,968,514,409
5. Step 5: Solve for x
   x = 7,568,624,968,514,409/99,300,426.95
6. Step 6: Final answer
   x = 76,219,460.49