Finding the Fourth Proportional to 103,429,373, 142,733,634.18 and 57,021,287.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,429,373 : 142,733,634.18 = 57,021,287.72 : x
2. Step 2: Convert to fraction form
   103,429,373/142,733,634.18 = 57,021,287.72/x
3. Step 3: Cross multiply
   103,429,373x = 142,733,634.18 × 57,021,287.72
4. Step 4: Simplify right side
   103,429,373x = 8,138,855,621,899,007
5. Step 5: Solve for x
   x = 8,138,855,621,899,007/103,429,373
6. Step 6: Final answer
   x = 78,689,983.18