Finding the Fourth Proportional to 28,429,429.61, 42,648,860.14 and 9,980,591.99

Step by Step Solution

1. Step 1: Write the proportion equation
   28,429,429.61 : 42,648,860.14 = 9,980,591.99 : x
2. Step 2: Convert to fraction form
   28,429,429.61/42,648,860.14 = 9,980,591.99/x
3. Step 3: Cross multiply
   28,429,429.61x = 42,648,860.14 × 9,980,591.99
4. Step 4: Simplify right side
   28,429,429.61x = 425,660,871,657,718.50
5. Step 5: Solve for x
   x = 425,660,871,657,718.50/28,429,429.61
6. Step 6: Final answer
   x = 14,972,543.50