Finding the Fourth Proportional to 930,812,146.59, 1,284,529,426.61 and 513,139,378.53

Step by Step Solution

1. Step 1: Write the proportion equation
   930,812,146.59 : 1,284,529,426.61 = 513,139,378.53 : x
2. Step 2: Convert to fraction form
   930,812,146.59/1,284,529,426.61 = 513,139,378.53/x
3. Step 3: Cross multiply
   930,812,146.59x = 1,284,529,426.61 × 513,139,378.53
4. Step 4: Simplify right side
   930,812,146.59x = 659,142,631,669,012,736
5. Step 5: Solve for x
   x = 659,142,631,669,012,736/930,812,146.59
6. Step 6: Final answer
   x = 708,137,118.85