Finding the Fourth Proportional to 12,923.60, 19,385.50 and 7,077.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,923.60 : 19,385.50 = 7,077.02 : x
2. Step 2: Convert to fraction form
   12,923.60/19,385.50 = 7,077.02/x
3. Step 3: Cross multiply
   12,923.60x = 19,385.50 × 7,077.02
4. Step 4: Simplify right side
   12,923.60x = 137,191,598.81
5. Step 5: Solve for x
   x = 137,191,598.81/12,923.60
6. Step 6: Final answer
   x = 10,615.59