Finding the Fourth Proportional to 389,064,681.50, 583,596,302.67 and 126,748,919.30

Step by Step Solution

1. Step 1: Write the proportion equation
   389,064,681.50 : 583,596,302.67 = 126,748,919.30 : x
2. Step 2: Convert to fraction form
   389,064,681.50/583,596,302.67 = 126,748,919.30/x
3. Step 3: Cross multiply
   389,064,681.50x = 583,596,302.67 × 126,748,919.30
4. Step 4: Simplify right side
   389,064,681.50x = 73,970,200,667,980,224
5. Step 5: Solve for x
   x = 73,970,200,667,980,224/389,064,681.50
6. Step 6: Final answer
   x = 190,123,144.52