Finding the Fourth Proportional to 1,276,079.69, 1,915,003.55 and 507,498.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,276,079.69 : 1,915,003.55 = 507,498.63 : x
2. Step 2: Convert to fraction form
   1,276,079.69/1,915,003.55 = 507,498.63/x
3. Step 3: Cross multiply
   1,276,079.69x = 1,915,003.55 × 507,498.63
4. Step 4: Simplify right side
   1,276,079.69x = 971,861,679,338.88
5. Step 5: Solve for x
   x = 971,861,679,338.88/1,276,079.69
6. Step 6: Final answer
   x = 761,599.52